Each and every one of us falls short of the glory of God. We are all sinners. There are certainly sins which are equivalent or worse than homosexuality. The practice of homosexuality is nonetheless sin. Your nephew does not abide by the law of God in that respect.
Hitler died before I was born. I was born from a variety of ancestries and identify as Irish Catholic. By and large, Hitler's behavior was no skin off my nose. I lost one uncle to a German U-boat but the desroyer my uncle served on had sunk a German destroyer on the previous day. Such is war. OK, Hitler had his little drawbacks but he built GREAT HIGHWAYS, engendered German patriotism and solidarity (for, ummmm, most Germans), built heroic buildings, rose from humble status to Reichschancellor. His uncle might have called him a "good kid" too but 6 million Jews, 5 million others and all those folks with operative intelligence, would beg to differ and they would be right to differ.
Your nephew's perversions will hopefully kill no one. That does not make his behavior morally acceptable. As the Good Book says: Woe to those who call virtue sin and sin virtue!
I get what you’re saying, but there’s no way I’m going to rationalize Hitler with my gay nephew just because the former built the Autobahn.
And my nephew happens to be Jewish so I’m not sure what the religion says about him. (I don’t know Judaism well enough)
For as Conservative as I am - and that includes defining marriage between a man and woman, this is one issue that is just too close to me. I’d have to recuse myself if there were ever any proceedings before me.
But thanks for your input.