What to do about in-laws?

Hi everybody. I'm having in-law trouble. I found out not to long ago that my husband's father hates my guts. It came as a shocker, because I honestly don't know what I did wrong. I thought everything was peachy to tell ya the truth. Ever since I found out, I have been publically bashed on facebook by his family. Before all this I put up with their little snide comments because I just thought that, that is who they are, and they don't mean anything by it. They have went as far as to saying that I should be punched in the face ( I'm 6 months pregnant by the way). They have called my unborn baby girl names too. Come to find out, my farther in law has been talking to all of my husband's ex's and wanting my husband to get back with one of them. I don't know if I can keep taking it. My husband went one month without talking to his farther, but now they are close again. I can't help but feeling this is betrayal. When my husband asked him why he was doing all this, he didn't even give him an answer, so I STILL don't know what I did wrong. If I bring up what his family did to me, it ends up us yelling at each other. My husband recently said he wants his family at the birth of our child, and that is where my problem is. Why should they be able to come in at the end and be treated with respect and dignity when they have caused so much pain my entire pregnancy? The only way my husband would know what this feels like would be if my family treated him the way his family has treated me, but that would never happen. So my main question is..... am I being unreasonable by not wanting them at the hospital for the birth our child? Am I being selfish? Any help is appreciated. Thanks!