Just a note, Hitler hated Jews from his time in Vienna, not WW1. Also I think its an AH Cliche to have Hitler succeed as any other than a Nazi. Its my opinion that it would hard to replicate Hitlers success in OTL, in any ATL. Having Communism succeed under Hitler is stupid IMO.
Just when he became a violent anti-Semite is a matter of dispute. As I wrote at https://groups.google.com/d/msg/soc.history.what-if/QJxLPYR2gI8/2jHBF7zYE0QJ
"Hamann's book btw is fascinating--like some other recent writers on Hitler, she casts serious doubt on Hitler's account in *Mein Kampf* of having become fanatically anti-Semitic in Vienna. She does not doubt that Hitler read and heard a great deal of anti-Semitic material in Vienna, and that this *later* had a great effect on him and supplied him with many of his anti-Semitic arguments, but the evidence for Hitler's anti-Semitism before 1919 is pretty thin, while there is considerable evidence of reasonably friendly relations between him and Jews. (Of all the early witnesses who can be taken seriously, she argues, only Kubizek portrays the young Hitler as anti-Semitic, and even he does so much more in the post-World War II published version of his memoirs than in the original version commissioned by the NSDAP.)"
See http://www.porges.net/JewsInVienna/5WasYounghitlerAntiSemite.html for Hamann's analysis: "However, reality, as it emerges from the reports of Viennese eye witnesses, has little to do with the myths Mein Kampf purports. Apart from the special case of August Kubizek, no anti-Semitic remark by the young Hitler has been documented