Furries aren't a race though, so it's not discrimination to say there are places they don't fit into. If my avatar looks Asian and someone says I have to change cause they don't like Asians that's racist, because real Asian people exist and it would be wrong to say something negative about a race of real people. If I'm a neon green cat walking around and someone says I have to leave, that isn't racist because, and it's weird to have to point this out, no matter what someone likes to dress up as, neon green cat people aren't really a race. Sure, you might really want to be a green cat person irl, but you're not and neither is anyone else so you can't be racist against something that isn't a race.
If you're really so desperate to stay in that place you are given a default avatar to choose from when you first load the game, so if you are asked to change you can use that. Sure it's not pretty, but if you only have a furry avatar it's at least something. Otherwise you can just respect the rules of the sim you're in.