Is it obvious which side of an issue is the right side and which side is the wrong side? When you look at the conversations on this site, or any other place where politics is being discussed, ridicule is common. Almost everybody acts like they're obviously right and you have to be delusional, ignorant or malicious to disagree with them. Almost nobody is willing to agree to disagree.
IMHO, politics is extremely debatable. It's like choosing between Blues and Jazz, or between beef and pork. Two people can both be intelligent, informed, rational, open minded, pure of heart, and still have completely different politics. When you fail to recognize this, you end up saying stupid things.