I don't want to be associated with my muslim friends
Are you saying that you want nothing to do with them.
Yes, I would much rather ignore them and go to a party instead.
It sounds like you are specifying their religion as the reason. You shouldn't abandon your friends over their religion. Why were you friends with them to begin with?
I used to like them a lot, but if they're Muslim then that surely means that they have a connection with ISIS.
Not wanting to spend time with someone just because of the religion that they practice is pretty insensitive. Just because someone has a different religion than you does not mean that you cannot be friends with them. Learning about their religion could really vastly expand your perspective.