Yes, Hitler in his pursuit of power was openly anti-Semitic. He never hid the fact that he viewed the Weimar republic as a product of Jews who caused the defeat in WWI.

Hitler's pursuit of power is best understood in two periods: 1919-1924 and 1925-1933. In the former period, Hitler was a revolutionary. His purpose was to violently depose the Weimar Republic. His rhetoric was still antsemitic, but because he wasn't looking to gain an electorate, he didn't give the campaign speeches as much. This period ended with his Beer Hall Putsch, and Hitler went to jail.

The latter period of 1925-1933. The anti-Semitic rhetoric is far more open and brazen. Here, Hitler sought to be elected and then destroy the Weimar Republic. Jews, among other dissidents, we're harassed by the SA, and Hitler openly spoke against them.

I would suggest reading Dietrich Orlow's 2 volume study of the history of the Nazi Party. Ian Kershaw's Hubris is a good book, and Eberhard Kolb's Weimar Republic has a most replete account on the topic.