Honestly I really believe it is far more important for us as individuals to learn to build relationships and strengthen our families and communities. It is tempting to write people off but if you understand Marxism that is a goal. Break those bonds.
Do we really think our ancestors all thought the same way? They didn't. There were brains that thought like your progressive friends and your conservative friends. My guess is that you are more aligned with libertarian thinking.
One key to get is that people have been programmed and abused mentally pretty much from birth. This goes for both sides but the progressives are clearly getting more of this from the education and entertainment systems.
That helps me show more grace than I really want to show. On top of that, as a follower of Jesus I am directed to love my enemies. I don't consider voters to be my enemies. More like misguided people that have been abused. I've spent many years trying to understand both the right and the left. I think I have a pretty decent understanding of where they are coming from. I have a lot of experience debating people on both sides. Its not productive in 99.9% of cases. At best you might convince someone that isn't involved.
One thing we should learn from the last decade is that people can evolve. Look at how many have moved away from the democrats and the left. If people would focus on being fair and truthful I think we could have even more success.