Is it wrong not to invite dad’s side of the family to the 1st birthday?

My son will be 12 months on the 31st of May. We have been planning his birthday party. However I am skeptical of inviting his dad’s side of the family. Over the few years I have been with my boyfriend, my family and I have dealt with a LOT of disrespect from his family. Not only that, during the pregnancy, birth, and postpartum my boyfriend’s mother has not reached out nor supported me at all. She even questioned if my son was really her grandson biologically. She wanted us to get a paternity test done. She rarely greets me, and when I’ve tried to extend the olive branch and invite her to lunch she didn’t respond. I personally don’t want them there at his 1st birthday. I don’t think that they deserve to celebrate this milestone when they’ve done nothing but be a thorn in my side. My family has even said they won’t come if my boyfriend’s family is there. What do you all think?