This is a long story so ill try to shorten it. Basically my now Husband (married 4 months) and his parents have had a huge fall out. This happened last July. It started because they felt they were being left out of our wedding plans, even though we made it clear from the very start we only wanted a small wedding, we were paying for it all and it was going to be what we wanted. We named a date 9 month before the wedding but didn't start making plans really until around the June time (we married in september). So there was nothing to tell them and we kept telling them this. We went to visit one day and everything kicked off his mother said she would be at the wedding but wasn't going to be happy. So my husband said well don't bother coming then , I don't want people there who aren't going to be happy for us and he was very hurt. Then it turned physical with his dad going for him and his mther and sister screaming at us to get out. I had taken my 3 yr old brother with me to visit them and was disgusted at the way they were in front of him, violent and swearing. I picked him up straight away and left without saying anything to anyone. We didn't talk for months then the week before the wedding his mother sent a letter (she lives a 5 min walk away)saying she wasn't coming to the wedding saying we had humilliated her enough and she was to upset. We wre totally dumbfounded as we had done nothing wrong. I cried lots and my husband has cried lots since.
We lost all interest in the wedding and as a result there was a lot missing from our day. Two days before the wedding they sent a text asking if they could come. My husband said we ahd never said they couldn't so was up to them. They turned up and sat in a corner all day and night making their whole family feel awkward. I went up to his mother and thanked her for coming and she blanked me. In the speeches we thanked his grandmother for buying our cake and his aunt for all their help and gave them a bunch of flowers and his mother burst into tears and ran out making a scene. I can't even look at my wedding photos because I hated the day so much. They have since sent messages apologising but no matter how much they apologise we can't get our day bak.
Even though I don't know whether to encourage my husband to forgive them or not as I'm worried about how he would feel if something happened top them in the future and at the end of the day they ARE his parents. We are both extremely hurt though and I personally won't ever forgive them for ruining my day but what should I do about my husband??

Your husband must be so hurt over their behavior so the only thing you can do him right now is be his rock. Comfort him and be his listening ear when needed because I know their behavior was outrageous, especially the dad fighting him, but I hope they could reunite onday and form some type of relationship.