To start off, my parents got divorced three years ago in a very disruptive and dramatic way. Within all of that, my brother stopped talking to my father and severed him from his life entirely. I don't mind that, I have my own relationship with my father, and my brother's relationships are his own. The issue comes up with my wedding, which is happening within the next two years. My mother (and later my brother) informed me that my brother would not come to my wedding if my father was invited, since, for reasons I cannot understand, he fears for his life around my father.
My father has said he'll do whatever needs to happen for my big day to work. My mother thinks that I should have two separate receptions, one for her family and one for my father's, and leave them both out of the ceremony to keep the peace. My brother won't be in the same room as my father, preferably ever. My fiancé thinks that we should just have the wedding with the whole family as I wanted it, and my brother can not come if he chooses, and the research I've done suggests that the internet agrees with him.
I'd just like to hear thoughts and opinions. I truly don't know what to do. I don't want to exclude my brother specifically, but I also don't really like the separate receptions and no family at the ceremony plan. What do you all think?