I've seen and read of conflicting views as when Hitler's anti-semitism came forth. A couple of anecdotes would lend credibility to a later adoption of anti-Semitic views, given favourable treatment given to individual Jews contrary to the wording of the Nuremburg laws.

Two Jews had notable interactions with Hitler in his younger years - Hugo Gutmann, one of his company commanders during WW1, was Jewish and was in fact the officer who recommended Hitler for the Iron Cross; and Eduard Bloch, the doctor who treated his mother (and him years earlier) prior to her death from breast cancer, was Jewish. Both men later gained protections and privileges during the pre-WW2 years of the 3rd Reich that were not available to other Jews.

Both emigrated and eventually settled in the United States. Bloch had dealt with some of the mistreatment typically suffered by Jews prior to 1939, and wrote directly to Hitler requesting assistance, which was provided. In the case of Gutmann, similar treatment was also experienced, but he continued to receive a pension for his military service, possibly due to Hitler's intervention. Further, SS officers intervened in his 1938 arrest by the Gestapo, though this instance doesn't seem to connect directly to involvement by Hitler - it seems the intervention was anticipatory of avoiding trouble due to knowing of the shared history of Hitler and Gutmann.

It's not the answer you're looking for, but hopefully it sheds some light, and perhaps more knowledgeable folks can expand.