Anti-Elven sentiment refers to dislike, distrust, racism, or xenophobia directed against the various Elven races (especially High Elves, Wood Elves or Dark Elves). It can involve involves sentiments such as hatred, paranoia, fear, distrust, intimidation, fear, and hostility towards the aforementioned Elven races, their cultures, langauges, religions (Church of Titanius, Cult of Nature, Dark Elven language) and states (Froturn, Dragoc and Artaburro).
Even though, technically, Humans and Orcs are also Elven races (by virtue of having descended from the Proto-Elves), they are generally not considered "Elves" (and don't consider themselves Elves either), and thus warrant their own articles: Anti-Human sentiment and Anti-Orcish sentiment.
Etrand and Etrancoast
Even though Humans themselves - the dominant race of the two states - are an Elven race themselves, they don't really consider themselves as such (and aren't considered "true Elves" by the other Elven races either), and in fact have a long history of animosity towards the other Elven races.
Despite having evolved from the proto-Elves - making Humans a sister-race to the Wood Elves and High Elves - their shorter lifespans, round ears and brachycephaly prompted the "true Elves" to view them as "a cursed, inferior, bastardized race of Barbarians" - in turn, the Humans of Etrand developed a hatred towards the High Elves (because of the first and second High Elven invasions against Fathred's Confederation) and the Wood Elves (because of the Great War).
During the reign of King Corlagon I of Etrand, the Humans adopted the religion and writing system of the High Elves, and many aspects of their culture. However, this change was a top-down process that wasn't without resistance by the population. Those who insisted on dying on the hill of the old faith considered the new faith to be a foreign religion imposed on them by "foreign, racially alien overlords" and saw Corlagon and those loyal to him as puppets of Froturn. As a matter of fact, during Aelfwaird's Insurrection, Aelfwaird of Dracfold violently expelled all High Elves from his domain and forbade non-Humans from owning property. Early on, the Church of Titanius responded to this anti-Elven sentiment by making sure that High Elven missionaries were consistently accompanied by professional bodyguards - even during Corlagon's reign, High Elven priests and bishops were replaced by Humans at the earliest opportunity, under the assumption that the Gospel of Titanius would be more palatable when uttered by fellow Humans.
In Etrancoast, anti-Elven sentiment - especially directed towards High Elves - developed due to the violent proselytization of the Titanist faith by the Etrandish: the Etrancoasti were well-aware of the origins of this foreign religion, and each time they violently revolted in the name of the old faith (431, 497-498, 514, 563-576), the first course of action was a violent pogrom against the High Elves living in the cities of Waterburcht and Yrvhaven.
Eventually, anti-Elven sentiment - at least against High Elves and Wood Elves - subsided in both Etrand and Etrancoast, only to be replaced anti-Dark Elven sentiments, especially in the big cities of Grandfolk, Copperport and the aforementioned two Etrancoasti cities. Dark Elves were - and to a large extent, still are - seen as a race of vagabonds, rogues, smugglers (of both people and illicit substances), assassins, slavers, prostitutes and sodomites. The existence of the Dark Elven mafia certainly did not help the situation either - efforts by Pirothea Nelvarryl and King Bryant I of Etrand had only a very minuscule success in mitigating the negative attitudes towards Dark Elves.
Even though King Cairbré I of Etrand - as well as his successor King Calhoun I of Etrand - had Half-Elven wives, the brewing Cold War between Etrand and the two Elven Kingdoms (Froturn and Dragoc) also naturally meant a rise in anti-Elven sentiments, which got to a boiling point during the infamous Carolus Conspiracy in 804 AEKE, which also temporarily ruined Etrand's relationship with its long-time strategic ally Artaburro. Between 809 (Froturnish Civil War, establishment of the so-called "Druidic Dictatorship" under the Consuls Ardryllus Sim'vara and Ta'ael Myrth'nddare) and 818 (end of the so-called "Druidic Dictatorship", fall of the consuls, rise of King Ivahó of Froturn), King Orlónius I of Etrand commissioned the proliferation of anti-Elven propaganda.
Many consider the existence of the Fathred-cult to be also a sign of anti-Elven sentiment in Etrand, as the otherwise Titanist kingdom not only permits, but in fact supports the sculpting of statues of Fathred the Great with the text "Fathred the Great, bane of the knife-ears".
High Elves make up 87.81% of the population of Froturn, so, with an Elven race being the dominant race in Froturn, the only form of anti-Elven sentiment is one directed towards Dark Elves and/or Wood Elves: just like in Etrand, Dark Elves are generally distrusted and viewed as an "unclean race of vagabond criminals and drifters", while Wood Elves were historically never discriminated against, with anti-Wood Elven sentiments only coming into existence during the reign of King Cael'mus of Froturn (r. 691-809 AEKE) and the so-called "Druidic Dictatorship" (809-818), as a reactionary response to a regime that was believed to favour the Wood Elven Cult of Nature over the Titanist Church of Titanius. As a result of this, particularly devout and bigoted Titanist High Elves often distrust Wood Elves.
Wood Elves make up 90.44% of the population of Dragoc, so, with an Elven race being the dominant race in Dragoc, the only form of anti-Elven sentiment is one directed towards Dark Elves and/or High Elves: just like in Etrand, Dark Elves are generally distrusted and viewed as an "unclean race of vagabond criminals and drifters", while High Elves may be stereotyped as "bigoted religious fanatics".
Just like the Humans of Etrand, the Orcs of Brutang are technically an Elven race too, but just like the Humans, they're not considered as such, and neither do they consider themselves Elves either. While the Elves and Humans view the Orcs as "inferior and barbarian" and stereotype them as overly violent and possessing an ungovernable sexual appetite, the Orcs themselves have a love-hate relationship with the Elven races: it is no secret, that the Orcs view Elves and Humans as "weak" and "only fit to be slaves subservient to Orcs", the Orcish male's preference for the Elven and Human female over the Orcish one is a well-established fact.