Out of my hands... again.

I get so upset when I see thing going the wrong way & I can't control it no matter my efforts. This issue is nothing new & should have been expected, but I keep wanting to see the good in people & it obviously isn't there anymore.
So we're fighting about his visitation time & the kids going to church every week causes a conflict. Seeing how they're not going to church by MY order but in order to learn God's will I didn't think it would be a bad thing for them to come to their fathers home a bit late. Well it was. He's arguing that I'm wasting his visitation time by taking the kids to church without his permission. He suggested they go only every other week so that he can have his time with them. In his own words "I thought that what little time I spend with my children should also be important and I too offer them the right path to go on so no I can't loose every Sunday to their religious teaching.". That's right... he can't lose time with the kids to God. Offering them the right path?? How? Playing in the yard? Watching movies? Veggie-Tales can only do so much!
But today I had to come down off my soap box & leave it in His hands as to what is right or wrong. I just don't understand how someone that was brought up in the church himself can stray so far from it. Please pray for my kids. Pray for me. Pray that he comes back to the person he was supposed to be.