Not quite, but he was quite an influential anti-Semite politician and statesmen in the interwar periods in Poland, and co-founder of the National Democratic Party One could only imagine what would have happened if his wishes were carried out. He is rarely mentioned today, but some his policies may have saved Poland from a Nazi attack in 1939.
Poland was a merely a physical entity that needed to be brought into existence through pragmaticbargaining and negotiating, not via what Dmowski considered to be pointless revolts doomed to failure before they even began against the partitioning powers. For Dmowski, what the Poles needed was a "healthy national egoism" that would not be guided by what Dmowski regarded as the unrealistic political principles of Christianity.
I especially enjoy this last remark:
Another area of objection to Dmowski was to his antisemitic remarks, as in a speech he delivered at a dinner organized by the writer G. K. Chesterton, that began with the words, "My religion came from Jesus Christ, who was murdered by the Jews
Dmowski often stated his belief in a "international Jewish conspiracy" aimed against Poland. In his essay "Żydzi wobec wojny", which comprises pages 301-308 of his 1926 book Polityka Polska i odbudowanie państwa, Dmowski claimed that Zionism was only a cloak to disguise the Jewish ambition to rule the world. Dmowski asserted that once a Jewish state was established in Palestine, this would serve as a nucleus for the Jewish take-over of the world. In the same essay, Dmowski accused the Jews of being Poland's most dangerous enemy and of working hand in hand with the Germans to dismember Poland. Dmowski believe that the 3,000,000 Polish Jews could not be assimilated and that they were far too numerous. In his own words, "a little salt may improve the taste of the soup, but too much will spoil it."
Dmowski had long advocated emigration of the entire Jewish population of Poland as the solution to what Dmowski regarded as Poland's "Jewish problem", came to argue for increasing harsh measures against the Jewish minority, though Dmowski never advocated killing Jews.
At least Hitler and Dmowski would have the whole anti-Semite thing in common...
although, I'm not sure how well this would help their relationship.
For Dmowski, one of Poland's principal problems was that not enough Polish-speaking Catholics were middle-class, while too many ethnic Germans and Jews were. To remedy this perceived problem, he favored a policy of confiscating the wealth of Jews and ethnic Germans and redistributing it to Polish Catholics.