The litmus test is whether they defend speech they don’t agree with.

Just because Gleen Greewald is "one of the few foreign journalists covering what is happening" doesn't automatically ensure he is unbiased, correct, or accurate.

there have been many pushes from the Supreme Court against the right-most Bolsonaro block because it openly flirted with a military coup. This is the blowback.

In fact, the very first instances of those pushes were during Bolsonaro's presidency; some motivated by government inaction or overreach (the disputes between Federal and State government during the pandemic comes to mind), some by political clash (Bolsonaro's son openly flaunting "closing down" the Court with military intervention; the usage of state cerimonies as rallies, and most importantly the Jan 8th stuff)

As far as I can tell, a political group that threatened the established government structure lost and said structure is now reinforcing itself. If the purpose is to ensure resilience against future attacks or a power grab is anothee discussion, but the primordial movement's reasons are clear