Tips on discussing politics?

I have a group of friends who all know I'm a communist and sometimes they agree but I feel like the liberal propaganda machine is desensitizing them whenever I prove them wrong. The group's de facto leader's beliefs are like libertarianism with socdem characteristics?? They do agree that America is a terrible shit country, they recognize racism and international terrorism, they recognize climate change, they recognize the American oligarchy and corporate power, but they only see bourgeois politics as the only way or have just given up. I'm able to prove that the USSR and China were successful in much more ways than the US is but they still don't think that communism will work. Should I even try to convince them? What should I do?