Yup, it's a shame that the II RP chose to be such nationalist and xenophobic in its nature
I'm sure you have no idea about IIRP.
Here is a little insight:
As a further comment in the attitude of the Polish Jews themselves toward the new Polish State may be quoted the following from Colonel Mason's report:
"Poland has recently put into effect a universal draft law, and the army is being mobilized under it. The men
[page 20 of doc. begins]
are collected at training stations and are receiving training under the general supervision of a French General, the actual instructors being Poles who have had military training or experience in either the German, Austrian or Russian armies. The army is very largely composed of Poles. Upon the passage of the draft law, 90% of the Jews of the country called for what is known as the blue ticket, which is an exemption certificate given to those who are aliens. Incidentally this has an important political bearing as being an official announcement by 90% of the Polish Jews that they consider themselves not Poles but Jews per se."
papurec.org/fundamental/PowerAims4.html
This is all the while that Jews were against independant Poland - IIRP.