Sure, you can work towards feeling more strongly about something, but I don't believe you'll ever be able match the emotional fervor the partisans feel -- I mean here the people who stew in their anger and embrace their emotions without reservations.

As a (rather extreme) example, consider Hitler. He was able to sway a great many people with what were appeals to anger and emotion (though I acknowledge there is much more to the phenomena of Hitler than this). Hypothetically, if you were a politician from the same era, say a rational one, and you understood that the way to persuade people is to tap into the public's sense of anger, I'm not sure you'd be able to match him.