It all comes down to a difference in opinion, since not everyone shares the same views. If you want to create equality, you should bring them both together and try to reason it out with them, and also share your opinion.
Maybe you need new friends? Anybody that thinks doesn't mind honest, factual debate, doesn't matter which way they lean. Before you tell me also that I've missed the question... If your question was just about bashing liberals, you should have worded it that way.