I noticed that some people just have an extreme hatred for furries.
I have a friend and I would not call him a generally intolerant person at all, he knows I am homosexual and never cared unlike all other people I have ever told about that(around 6 people), but he has an extreme hatred for anything furry. Like on the level of “All furries should be killed” not the usual shit we can read on the internet.
I do not understand it, but there is really no way to get him to any not as extreme standpoint.
I think that mainly is it, personal experience and a locked in first impression.