WARSAW — The chairman of Poland’s conservative ruling party, Jaroslaw Kaczynski, has called the LGBT rights movement a foreign import that threatens the Polish nation.

Kaczynski, Poland’s most important politician, also said ‘‘everyone must accept Christianity’’ and that questioning the powerful Roman Catholic in Poland is unpatriotic.

The positions that Kaczynski took Wednesday in a lecture on patriotism in the central city of Wroclawek come before European Parliament voting next month and a general election in Poland in the fall.