not allowing my father to be part of my kids life

I moved out of my dads house at 17 and went to college in a different state. I haven't been back 6 years and haven't seen him since. He has made no effort to see me or visit what so ever even though I am married and now have two children of my own. 

Growing up him and my mother were incredibly abusive. I was the oldest of 6 children and when I was 8 my mother developed a severe drinking problem. My father worked a 12 hour a day government job and when he realized that I was the one caring for my younger siblings while my mother was passed out drunk on the kitchen floor he did very little to help the situation. He basically ignored it. Regardless of her drinking problem my mother kept getting pregnant and has her final child when I was 12. At this point she was intoxicated more than sober and I would miss school regularly to take care of my baby siblings, the house and to get my other siblings to school etc. My grandmother helped when she could but she was battling caber and was too sick to handle it. My father would claim he couldn't miss work and would ignore it. The school eventually became annoyed about me missing school so unfortunately I had to return. My mother would drive my siblings to school then come home and drink a entire bottle of vodka and pass out, leaving my younger siblings with my grandma. My mother hated me. She saw me as an obstacle to her drinking and would punch, kick, bite me and hold my hands under extremely hot water as I cried in pain. Amazing CPS weren't called until I was 16 and my parents forcede to lie about the situation so nothing was ever done. My mother ended up dying when I was 17 after falling down the stairs drunk. After she died my father became extremely resentful of being forced to care for us. He was extremely emotionally abusive and if we ever cried or were sad he would tell us to get a grip on life and to stop being pussies. He got a girlfriend shortly after and me and my siblings became an annoyance. He showered her and her two kids in lavish gifts and would verbally abuse us whenever we came around. When I was 18 I moved states for college and my younger siblings ended up moving in with my grand parents. When I moved it was like a whole other world. I was finally happy. I made friends. Ended up meeting the love of my life. My father didn't try to contact me at all. I got married and don't invite him. Shortly after I got pregnant and he heard through the grapevine. He called me and left an abusive message on my answering machine about how I was getting an abortion and he was going to fly here and drag me there by my hair and I don't have a choice. I didn't respond. 5 months later my son was born and he texts me congratulations. He starts milking the grandpa role and even has people congratulating him on Facebook. He even made a picture of my son his profile picture. I was pusses but let it go because I refused to get sucked in to more of his vitriole. After than he would write me very couple of months but eject asked to Skype to meet my son or my husband. 16 months later I had my daughter and when he found out in was pregnant with her I again got another horrid message about getting an abortion and how I'm an idiot and so is my husband. Let me just say my husband makes $80k a year. We're perfectly equipt to support two kids. Anyways when my daughter is born be again starts milking the grandpa role and continually posts on Facebook how much he loves his grandchildren but never once has met them nor asked to video chat what so ever. My kids are now 21 months and 4 months and I've decided to cut ties. We had words and I basically told him that he won't use my kids as some charade to pretend he's a great person when he isn't. I told him how miserable he made my childhood and that I never want my kids to deal with the toxic filth that comes from his mouth. Since the conversation his brothers and sister have been sending me messages asking how I could do this to him because they honestly have no idea of about how we grew up. He's also told them all he skies his grandkids once a week which is total and utter bullshit. I'm so relieved that he's a part of my past. The only good thing either of my parents did was give me my siblings and I will be eternally gratefully for that gift. But as for my kids they will never be around a man who made my childhood hell and then openly have affection to his girlfriends children while denying it to his own. A man like that doesn't deserve to be in the presence of my amazing children. Do you guys think I made the right decision? Sorry for the long post.