WIBTAH if I don’t go to my friend’s birthday party?

just for clarification I am the kind of person that would inconvenience myself just so my friends can be happy, so this is unusual for me.
it’s my friends birthday (Alex) in a couple of days and me and my mutual friend are planning a surprise party and asked me if I would come if person1 and person2 came.

for explanation, Alex is a good friend of mine who I was in a group with alongside person 1 and person 2 and the mutual friend. unfortunately person 1 and person 2 seem to be very immature and extremely rude and try to always be a victim. The last straw for me was the last conversation where person 1 personally insulted me and person 2 left mid conversation while we were having a talk about a problem that happened and it was my turn to explain my pov. Alex my friend himself even thought their behavior was very immature and told me there’s no point in being friends with them anymore. I personally don’t even know why Alex is still friends with them but it’s none of my business. fast forward to now where there’s a definite chance they’re coming to his birthday party and I have a very strict boundary of not letting immature assholes like that meet me or see me especially after disrespecting me.

yes I have thought of going and just being in the corner or talking to my other friend but these two people are very main characters so the party will kind of be about them and it’s probably only gonna have 5 people in total.
I was thinking of maybe just meeting him another time and giving him a small gift instead.
so reddit, will I be the asshole if I don’t go?