What to do when you seriously can't stand your In-laws?

My husband's mother has ped away. He has a step mother of 20 yrs and a alcoholic worthless dad. And a brother who I now cant even stand the thought of. His step mom is OK I guess. But she is rude and very very pive aggressive. About a yr ago we caught her cheating on her husband and my husband called her out on it.. now things are just weird and she is always making some comment about it. I can't stand his dad I can't stand the sight of him or to hear his name or anything about him. He is an alcoholic and treats my husband like crap. He will get drunk and call him up calling him horrible names for no reason. Him and his wife has always treated our kids different (yes his own flesh and blood grand kids) then his step daughter's kids. He knows everything about them and always see's them when he is home (he is a truck driver and gone 6 weeks at a time) but literally half the time he doesn't even bother to see his own real grandkids. The other day he was talking to my husband on the phone and he didn't even know our son had turned 2 yet (His birthday is in Aug) When we go to "visit" he pays no attention to our children at all doesn't even look at them really and makes it obvious that he plays with the other grand kids but not ours. He's always drunk. In 5 yrs I have NEVER seen him sober (granted he is gone 6 weeks at a time) but no NEVER seen him sober and I'm not exaggerating. Now on to the brother. Well I had really never been around him.. He doesn't come to family gatherings and has always lived 2 hrs away. Well about 8 months ago he "quit" his job because he could make more on unemployment (yeah what a joke right?) And my husband offered for him to stay with us for a month or two until he could get on his feet. Well he def took full advantage of that. He was here for about 5 months.. and a total bum the entire time. We was fully supporting him in every way (even down to cigs as my husband makes his own and he would handily help himself) He didn't have a job the entire time but was receiving unemployment but helped with nothing not food or anything. Didn't look for a job and didn't touch a thing around the house.. in fact I would clean dishes out of his room when we would start running out of silverware. Then he totally trashed the room. Because he had a dog and it would puke everywhere and he wouldn't clean it or he would just spill things and not clean them up by the time he left the room was trashed and smelled awful. We had to replace the flooring (even down to the sub floors) to a tune of about $380 and we moved him here costing about $250 and fully supported him for 5 months needless to say he has cost us A LOT of money.. enough to make my stomach turn when I think about it. Well we ended up having to kick him out and instead of him being grateful for everything we have done all he did was cause all kinds of drama texting my husband telling him how he is an idiot and all he has is a high paying factory job that will be gone one day and he shouldn't choose me (he blamed me for being kicked out) over his own brother. Called all my husbands friends and told them it was my fault called his dad and his dad went on a rant about me ect needless to say you get the point. His parents always get less for my kid's at Christmas and then if we can't make it for a family function his step mom calls up b*tching us out because all his dad wants to do is see the kids and we can't make it on his one week home? (What a joke) Well anyways his brother will be at Thanksgiving and I can't stand any of them anyways so what do I do? I'm dreading every minute of it. I already told them what dish I would be bringing but I would seriously rather drop it off and leave. I get along with his step sisters all right but one is rich and thinks she is better then everyone else and the other isn't around much. I haven't seen his brother since we kicked him out.. I really don't want to see him either. It's going to be a lot of tension. What do I doooo? Can I never go around his family again? UGHHH