I find it humorous to engage people in discussions of why they believe things to be a certain way. Oftentimes there is no real logic or rationale, just an arbitrary decision to support or not support something.
I am guilty of it sometimes too.
But the problem stems from the laziness of some people. They are unwilling to put in the time to figure out why they believe things to be a certain way. It is a good intellectual exercise to do the opposite of the slackers and spend a few minutes with yourself.
Why are you a Democrat? Why are you a Republican? What values are important to you and why?