So long as people can find sufficient external support for their emotional reasoning, they can successfully operate under the delusion that they are engaging in logical reasoning instead. There is much power in recognizing that successfully warding off the terror that you are wrong confers no affirmation that you are right. Of course, it is much easier to see that in others, perhaps because doing so also aids in avoiding the terror of looking in the mirror.
I often wonder what the world would be like if we didn't conclude that logical reasoning is good and emotional reasoning is bad.