Here in St. Lucie County, FL, the mods on ND tend to look the other way on political threads unless you go ad hominem.
I think many people are too ambitious promoting any rational cause on any social media. You are not going to cause a road to Damascus moment for a deeply programmed progressive. The best you can ever hope to do is introduce a vague element of doubt; not one they would admit, but one they might ponder during commercials on the Don Lemon show.
But that is exactly why one might discuss with others!