NTA, you are allowed to feel shitty because of shitty jokes, maybe each person does it just once but to you it adds up, not their fault that they were the last drop but it's also not your fault people are assholes about it i get that discomfort shows as laugh but as an adult you should know not to laugh at people's face, and it's not your job to gentle parent whole grown adults it's weird that your friends are upset with YOU and not the joker ?? like ??? i can't imagine a situation where my friend gets bullied and i don't join her side