Another part of me doesn't want a very hurtful part of my past present at a ceremony celebrating my future. And especially if they wouldn't be there in support, but more out of morbid curiosity, I don't want them there either.
I don't think your being selfish at all, your parents abandoned you, they have also abused you by instilling you into
corrupt and devious religious cult, which they haven't obviously left yet.
Thats a dark and regrettable past that is not worth repeating itself for you or your soon to be wife and children.
Now is the time to work on your future, toward something better for your new family.
Stand up and take responsibility for yourself and your family.
Bringing your parents to your wedding where they would mostly have a sullen look on their faces
and intensionally sadden an otherwise joyest event would be a miss step by yourself.
This is your day to shine and is a beginning to make everything wrong for what your parents did to you.
Look at it this way do you think they would invite you to day that they celebrate like a wedding anniversary.
The truth of it all is your parents wouldn't really want to be there anyways, so why put them in that position
with the added potential of ruining a very special day for you and your fiancé. Take care