It is not a logical fallacy to acknowledge someone's point, note there's room for confounding variables, and there's a difference between calling oneself a Christian and being one. No fallacy there at all. Unlike the example given in your link, I'm not claiming 'real Christians don't get divorced,' so to speak. I don't know what the numbers would show if the criteria for what's called a Christian were much more stringent.
It is not for me to pass judgment on God or His acts. He's sovereign Lord, not answerable to me. It is within His right to do some things that would've probably been evil if someone else did them. Say, someone who didn't create & does not own the universe. As for the youth slain in the flood, it's quite possible they were better off dying 'innocent' as you put it, than raised in the corrupt society. But considering this issue reminded me of something else you posted, which also brings to mind that acts against a nation/people often do entail a lot of 'collateral damage.'
Rationalizing terrorism through infanticide as collateral damage
And that's not even mentioning that Hiroshima also was an absolutely heinous act.
Some time back I did a little reading on Hiroshima, since I'd heard it criticized and was curious about the subject. A few observations:
1.) If the level of 'die fighting' duty in the Japanese military was anything like characterized in the movie 'Letters from Iwo Jima,' then sending in allied troops to 'take' Japan would have had a grisly cost in allied forces.
2.) The lives of 'our guys' should be much more important to us than the lives of enemies.
3.) Wars are fought between nations, not simply individuals. People complain about 'civilian' casualties, but some people in the military may be drafted civilians. And just because someone joined the military at a given point in time doesn't mean he or she agreed with or caused the current administration policies. Sometimes the mentality seems to be that as long as you just kill soldiers, that's okay. They matter, too.
4.) If Hiroshima was so 'over the top,' why didn't the Japanese surrender before requiring a 2nd dose? And why did the Emperor have to step in to effect a surrender after that?
5.) Use of nukes to close the war with Japan probably saved a lot of U.S. & allied lives. Compare & contrast with the opening scenes from another movie, 'Saving Private Ryan.' I'd hate to think the people we count on to lead the war effort would subject our own people to that horror in order to avoid being 'too hard' on the enemy.
Richard.