How does the next paragraph end?

How to be civil when talking about politics
Avoid wanting to change their mind.
Don't go into a discussion with the goal of changing someone's mind or proving how bad their ideas are. Trying to change someone's beliefs is often at best futile and at worst annoying or upsetting.
If you're tempted to talk about politics with someone, check your intentions. If you want to prove something or tell them how dumb you think they are, you might want to sit this one out.