Actually, people will resist your opinions on the basis of your attitude. If you can attempt to be civil without the use of ad hominem attacks, you'd be more successful in convincing people. Calling people stupid doesn't work. In fact, it makes you seem like a crackpot.

All you need to do is look up the debate etiquette to see that you've broken that rule.

It's like this. I argue with my brother all the time. I make a point, he gets mad and tries to make a point against me. I make another point refuting his point, he calls me a mother fluffer. Who won?

If I didn't win... he at least lost.