Its hard to hear an argument that goes against something you think you believe and be open to hearing that side of things clearly. Theres this subreddit called change my view and its really cool becasue its a forum to have discussions about really polarizing topics in a way that just tries to explain each side in a rational, factual manner. There are specific rules to the subreddit that are meant to eliminate any type of non-productive discussion. I really like it.