Hey, everyone is entitled to what they like.
If both parties are consenting, having a good time, and no-one's getting hurt then all is fine.
I'm not going to chide someone for liking fury. I have my share of weird kinks that I like. I may not like what they like, and it might squick me out, but if it's harmless I'm not going to care.
Now if someone's into guro then I'm going to raise an eyebrow and give a, "What the fuck?" A little blood play is all well and good, but guro is where I draw a really big fat line.