Anti communism based in Poland is good. Carl Marx had a bad character and when it comes to communism it is not good to think it is good. Some people, for example Wikipedia.org creators, are most probably trying to conceal mass killings by communists!
Link to polish patriotic and also anti-communist organization: http://ipn.gov.pl/
Edit 2021-11-29: Warning. It seems that IPN (Instytut Pamieci Narodowej) is doing history revision. They learn that Poland existed in Warsaw in 1947 in a way that I think is very unlikely.