I was discussing irrational Bush haters with my INTJ friend.
We are both liberal politically and can agree that Bush's policies have done more harm than good for the country.
However, we differ on what we think of those who choose to hate Bush because the media encourages it or that it is cool to do so- people that make their decision to do so without finding out why they should dislike Bush.
While my INTJ friend acknowledges that many people don't think about why they hate Bush, he is content with the idea that they believe in what he considers to be the right conclusion. He would condemn and dislike a rational conservative before he would do so to an irrational liberal.
I think the reverse that it doesn't matter that the guy who talks about how much he hates Bush has the same 'political beliefs' of me- if he doesn't know why he does so, then I'd encourage that person to actually study the issues and come to his own conclusion- if that person is capable of doing so of course.
I guess it goes back to that question on many MBTI tests to distinguish between J and P:
What's more important?
The results themselves
The process used to achieve the results
I think another difference in terms of politics, is that J types are more likely to stick with a certain ideology and be rigid about it, while a P type would seem more 'moderate' because he or she would be aware that the same policy doesn't work for every circumstance.