The one thing I've found that helps have rational political discussions is to focus on a specific issue or topic at a time instead of flag-waving for any political theme.
Not a panacea or cure - and doesn't really help when the other person(s) thinks you have few/no rights, but it does help crack the "my team VS your team" crap that keeps things from being solved.
Faith Collapsing is a host set up by me (Steven Saus) with the same sensibility of the BBS I ran back in the 1990s - I set it up for me, but folks I personally know are welcome to join if they like. Left-leaning; fascists will not be happy with my moderation. Incitements to violence or hate speech will get you gone.