I want to call out rude people heckling my girlfriend during my sister's wedding
Why would you have to silence heckling?
No idea but I am her brother and I should protect her.
I can understand your concern. Needless to say, it's inconceivable and breathtaking rude that anyone would heckle the bride's brother's girlfriend at the wedding.
Yea I just want to make sure my girlfriend is comfortable. No way I am going to allow this to happen.
Well if someone is being rude it is ok to ask them to leave and not ruin the party for everyone else. Try to not make a scene if you have to do this and be disruptive yourself.