I suspect talking to them isn't going to help much. Especially if they're the type of progressive who insists they're not political, that they're moderates. Even though they support all the progressive causes and none of the conservative ones. A moderate person finds things on both sides they find agreeable. And none of them very intensely.If they are friends, perhaps you may want to consider talking to them and and seeing them. Perhaps you do...I have no idea nor is it any of my business.
I'll simply note that somehow "facebook" got people to redefine what a friend is.