Craig,
Looks like you have gotten a lot of good advice here. Mostly, I say, "Me too" to what is said here.
I would only like to add that you need to assess your unique situation as regards your relationship with your parents. Only you know how they will probably react to anything you do or say. Consider your course of action and then proceed.
I would, by all means, say to my parents (in your place) that they accept all of us or none of us. There is an expression people used to use in the south (of the US), "like me, like my dog." You and your family are a unit. You are not in subjection to your parents. You owe them respect however, that has its limits. The honorable thing is to love them but set limits as to how much influence they can have in YOUR family. You and your wife must set the rules for your house, not your parents.
If your parents are cruel, don't let them have contact with you, your wife or your children. You have to protect your wife and children. Your mom and dad undoubtedly love you. But don't be blackmailed. If you talk to them, reaffirm your love for them. But set the terms under which they may have access to you and your family. You also need and have a right to be loved.
I hope it all works out well for you. Keep us posted
Marcos