Some people aren't rational (well that's an understatement, we are all at times, but some people are almost entirely incapable of rational thought at all times.

Some people aren't rational (well that's an understatement, we are all at times, but some people are almost entirely incapable of rational thought at all times.) Some people have severe problems and should be receiving professional medical help, but aren't. If you try to understand what's going on inside their head, you will probably fail because their thought processes are alien to your own. But more important than understanding how they think is understanding that they exist.