This is very well written - and I agree entirely. The fringes are pulling the centre ground away. I struggle with both the right and the left, both are convinced of their moral mandate and neither brooks any dissent. It's good to see there are still moderate centrist writers out in the wild.
I find myself increasingly politically isolated away from everyone. I took a test a few years ago and wrote about it here. https://medium.com/p/dc04f4267b96 I suspect you're probably along the same political lines. Nothing beats a bit of centre ground rationalism. :o)