Specifically in the inter-war period, Anti-semitism varied depending on who was in charge (Piłsudski was friendly to Jews), but the Polish government encouraged emigration of Jews to Palestine in order to solve their domestic "Jewish question" by getting some of them to leave. Post-WW1 across Europe there was violence and discrimination against minorities who didn't fit neatly into the mold of uniform ethnic states, especially in central/eastern Europe where there were many mixed populations. The Polish government & military provided arms and training to Zionist paramilitary organizations such as Irgun with the aim of overthrowing the British Mandate of Palestine in the '30s and establishing a Jewish state. There was an idea that if large numbers of Polish Jews were founding members of a Jewish state, it would give Poland more influence in foreign affairs (this is after encouraging them to leave, but go figure).

The situation of Jews vis-a-vis the government in inter-war Poland is discussed in detail in "Black Earth: The Holocaust as History and Warning" by Timothy Snyder