League of Polish Families (LPR) is not an "ultra-right-wing" party. It is conservative pro-family Catholic party which tries to adhere to the social doctrine of the Church. Self-Defense (Samoobrona) is a populist party trying to protect interests of the people who got impoverished during shock "therapy" and privatization, critical toward reforms of the last years.
These parties are not dangerous. They represent legitimate and peaceful interests of a large part of Polish population.
"They represent legitimate and peaceful interests of a large part of Polish population."
They represent idiots.