Lots of people force their personal values onto real-world issues for various functional reasons. Fi does not hold sway in this domain. To the contrary, we've got Si-driven racists, Ti-driven Randroids, Fe-driven gay bashers...ah, you get the point.
We are in complete agreement, though, that when people are completely irrational about life it can be irritating.
Does it make you feel better that I weigh my personal values against 1) life experience and the physical world around me, and 2) against the political opinions of the most erudite INTP I know?
For what it's worth, I'm not trying to have a huge argument with you, I just wanted to perhaps sway you away a bit from your preconceived notions of Fi.