Can I go and get my tip back?
Why do you want a tip back? Did something happen?
Yeah, the bartender's behaviour was so rude. He didn't give me an explanation why he took my tips, he just said I should have known, you idiot.
The bartender shouldn't have treated you rudely, but you can't expect him to give you the tips that you gave him back. Next time, wait to tip until you are ready to leave.
I'm not going to tip for that shit. I want him to give those tips back.
I'm sorry you didn't have a good experience, but tips are to be expected in a bar. Even though it didn't go the right way, in the end he could have just had a bad day. How about instead of demanding the tip back, you can try to ask why he said you should have known?