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BigTTYGothGF

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I read thru it and most of it is accessible to an undergraduate. As long as you remember what Sym{1,2,3} are (clearly explained in the text), and how a resultant works (many undergraduate textbooks will show you), how SL2 works (reasonably common undergraduate topic), and can figure out the bit about the dual space being the same as those differential operators, everything else is just basic (high school) algebra.

you could tell different brands apart from far away

This is just the tyranny of air resistance and fuel economy.

Many of my fondest memories of technology come from times past...

Is that because of the technology or because of who you were at the time?

If you were asked, would you have voted to allow the building of your own home, the infrastructure and roads around it, and the businesses whose tax revenue funds your local municipality you suddenly are so concerned about?

My town isn't perfect in those terms but it's probably about as good as possible, so yes I would have. Of all the places I've lived, tho, there's certainly lots of thing I would have opposed, given the chance, like all those highways.

What I can see is a fairly clear indication that they do not want contributions from people whose politics differ from theirs

This is the same FSF that in the past has refused contributions from people whose politics include "I would like this software to run on my windows/apple/other proprietary platform". They're extremely political.

I want development history to be squashed. I want to have a nice clean `git log` that I can look back thru and not see a mess of 'WIP' and 'fix' and other noise.

Unless you're saving every keystroke from your editor you're already squashing history, we're just arguing about degrees.

creating a branch starting at the problematic commit

Code always lives in a context, and when you're fixing a problem that exists in top-of-main the context of the fix needs to be top-of-main, not some commit way back in history. Also if you do it that way, you'd better hope that no later commit also touches that same line.

I then get people coming to me and complaining they can't merge

A team needs to agree on git practice in advance, and not have one wildcard go off and do their own thing.