Do it only for your daughter.
Why is your daughter going to marry such a man?
If she wants you to go, you should.
yes, you should go to the wedding. go for your daughter's sake. If her fiancée is as bad as you say, your daughter is going to need your emotional support going forward. don't create a rift now by not attending
if you want to be any part of your daughter's life in the future, then yes, you need to go. it's your daughter's day, don't let the tool-in-law ruin your relationship with her.
can he even provide for your daughter. or is he under your roof.. cause his a$$ would be sleeping in the car tonight if it were my house.. she can join him there too.. get a taste of this perfect life he can give her