> ...this is a case of quarantine for thee but not for me.

I think you have this backwards?

And I'd note that this is just an open letter signed by those willing. Perhaps a left-leaning subset.

But yes my first thought when I see this kind of thing is how people have been criticizing religious gatherings.

Edit: oh I see how it can be viewed the other direction, where "thee" is the right and "me" is the left.