I sometimes change my opinions. That is because I have come across new information. Some people find this confusing, and I find that disturbing.
@Divan Not only do I change opinions on the basis of new or improved information, sometimes I recognize the validity of opinions which are not identical with my own, and am still able to feel comfortable holding my own opinion and also not require others change their opinions to conform to my own. Which baffles the hell out of some people.