So what are the chances that his brother would be in that exact right place at that exact right time?
Well, let's look at his half-brother, Alois, Alois Hitler, Jr., was a waiter in London before World War I. He married an Irish girl and they had a son, William Patrick. William Patrick and his mother emigrated to this country, IOTL, and he joined the Navy and fought in the Pacific. Adolf was a stubborn
slacker and a lazy "artist." He was rejected two, or three times, by the Vienna
Academy of Art, because he couldn't draw people. He blamed the Jews for this. Back to Alois, if Adolf was out of the way, he'd probably go to Bavaria
in 1914, join the Bavarian Army, get gassed, and never rise above the rank of
unteroffizier, or corporal, and he'd be the one assigned to keep an eye on the
DAP, write Mein Kampf, in prison, and then write another, secret book, that
won't come to light until 17 years after the war.