It is quite striking, indeed.

I've always experienced this kind of polarization between STEM and social science departments in all the institutes I've worked in, but it usually was just a matter of very different efficiency: STEM professors would complain about the utter lack of efficiency and focus when annoying university policies had to be implemented. E.g., the implementation of the Bologna reforms in Europe. It's annoying, but the STEM approach was just to, let's get it over with by just acting quickly. The humanity approach was to discuss, discuss some more, form workgroups, have meetings, discuss, delay, etc... and in the end, when they had to act, they'd just copy whatever the STEM playbook had achieved 2 years earlier.

It never looked as polarized as what seems to be the case in the US. And much less ideological or politically flavored.