Morality might not be the best word for this. Morals have to do with what is conventional and accepted in a society, more than a black and white right vs. wrong judgement. Perhaps appropriate or wise might be a better word. People will continue to have children regardless of morality or appropriateness. It's what we do, it's what most of us are here for. Children happen.
I chose to have two and then I corked the stork. I was born late in my parent's life and it was a huge mistake. I haven't had parents for 38 years but my mother appears in my dreams almost every night. I love my kids but I didn't raise them for the world we now live in. I thought the correction would occur long before this.
Now I have 4 grandchildren and am concerned for their well being, not because of my kids, but because of the world they are growing up in. My life was easy because I made it so. My children don't have it so easy because there is so much control.
My grandchildren are prepped for the best but not the worst: that things keep going the way they are until the world flies apart at high velocity. That's probably a world I'll never see, but the thought of them having to fight tooth and nail for their survival fills me with dread. Perhaps having children was not the right decision after all. Time will tell.
As a parent myself, I don't consider it suffering to having adopted them. I want to think that I made their life a better place, because of the adoption.
I think this guy used immoral for a specific reason. But I also think that he wouldn't remove himself from this mortal coil just because of his branch of morality, nor would he put a murderer to death.
I also think that he doesn't have kids, so he doesn't know the joy of having one smile at him and call him daddy.
But then, I live for my kids hugs. I'm just a sucker that way.
Adopting children is far different from bringing them into the world. What you're doing is a far nobler enterprise. They were here already. You give them what they need to survive and to thrive. That's a wonderful thing.