Am I wrong for not wanting to take my kids to visit my husband’s grandparents?

My husband’s grandparents are very old and probably don’t have much time left, but they are not nice people. His grandmother called me a witch and a fornicator because I got pregnant before marriage. His grandfather said I shouldn’t be in this country because my parents are immigrants. I had his grandmother added as a friend on Facebook for a while and she kept posting extremely ugly, racist things. She commented I was going to turn into a pig because I got vaccinated for Covid. If I spoke my native language she told me “this is America, speak English or get out.” Even though I was born in America she says I am not really a citizen or American. She has said she thinks anyone who is not a white Christian will burn in hell. I have had her blocked for over a year because of how nasty she was to me online. When my first child was born she told me she prays he’s not a fa*got like me because I am bisexual. Just awful things. My husband wants to go visit them because they’re about to die and they’ve never met our kids who are 4 and 2. I do not want to, for very obvious reasons. Firstly it’s like a 6 hour drive and secondly they’re fucking so mean to me. Why should I put myself in that environment? He tells me they’re not going to be alive much longer and he just wants to make peace with them before they go. I told him if he wants to see them he will have to go by himself because I don’t want my children around those types of people. Am I wrong?