> They just either disagree on the cause or proportion.

And for very specific reasons, too.

One reason is unwillingness to feel like they have to take responsibility.

Another is conceding that would mean they might have to make changes, and laziness is powerful.

The worst reason is that to acknowledge it would be to grant that an alternative political perspective is right about something, and one's own political identity is tied to that other political perspective being always wrong.

"It is easier to con a man than to convince him he has been conned." Too much emotional investment in being right and too much fear of social repercussions simply for changing one's mind. The reality is changing one's mind to new data is the hallmark of integrity.