It means to be snidely controversial.

> Putting aside GitHub’s relationship with ICE…

If you actual actually wanted to put that aside, you could have…put it aside.

(Plus it being weird on a substantive basis. Selectively blacklisting specific government agencies…that’s just not a sustainable approach.)

What's unsustainable about it?

I thought this was obvious, but you will be asked to evaluate every government/organization on their morales. So they enforce immigration laws, not enforce it, enforce improperly, do they support abortion, do they support the right side in the Middle East, do they have racist policies, do they not have anti-racist policies, do they limit freedom of speech, do they not limit free speech enough.

Every service has rules but are the rules clear and consistent enough that organizations can reliably use the service without worrying they’ll be terminated.

> you will be asked to evaluate every government/organization on their morales

So what? Obviously you won't respond to all the permutations, so can draw only some red lines.

> without worrying they’ll be terminated

Yes, you can have some principles without increasing these concerns