@Dragonbird I totally agree. On of the things that occurred to me about that video is that it seems to be edited to take some of the lines of dialogue out of context. IRL I bet the situation is a lot more complicated then just "Should I buy you beer, or fucking kill you?"
I expect the men confronting Geralt are bounty hunters who are hunting for him and Vessimer. Thus they have a reason to try to remain anonymous by getting them drunk
On the flip side, if he kills the bounty hunters the townspeople will probably think Geralt is a monster and will be less likely to co-operate with him in his search for Yennifer. "I'm a Witcher" is the middle option where you still kill the bounty hunters but you aren't responsible for starting the fight.