They're fine, honestly. Like yeah, it's not my personal cup of tea, but in all my interaction with them, furries have been nothing but polite and pleasant people who don't force their interests on me. I hear a lot from other artists that they are fantastic clients to do art for; they pay well and they're nice and appreciative, which is pretty great!
Like every interest group, there are bad apples, but they mostly seem all right.
I think people who are bullies just like to find people they can label as "cringe" as an excuse to be mean, and with people being more aware of things like neurodiversity, disability, racism, LGBTQ+ etc. these days, and it being less acceptable to be mean to people with those characteristics, people have decided to be mean to furries because they're an easy target, as people with "weird" interests, but without the protection of being a "marginalised group", same as LARPers, really. Some people are just dicks, and they just want somebody to bully, usually because they're insecure. Furries know what they're about and they live their best lives, and honestly, I respect that.