FWIW, here's an excerpt from the I. A.
https://policy.defense.gov/portals/11/documents/hdasa/references/insurrection_act.pdf
(1)
(2) [so hinders the execution of the laws of that State, and of the United States
within the State, that any part or class of its people is deprived of a right, privilege,
immunity, or protection named in the Constitution and secured by law, and the
constituted authorities of that State are unable, fail, or refuse to protect that right,
privilege, or immunity, or to give that protection; or
or obstructs the execution of the laws of the United States or impedes
the course of justice under those laws. [/b]
[/b]
So were the Democrat mayors and governors unable, failed, or refused to control the unrest 
Considering they propagated the lies that incited much of the violence, often either before lab results were in, or in statements contrary to those results, and then refused to use the means at their disposal to stop it, even ordered police precincts to be abandoned rather than defended, to me the question is not so much as you have posed it, but rather as whether they were pandering to the rioting demographic out of sympathy or for votes?
Either way, they failed to do their jobs.
They did not just abandon the police, but abandoned the safety and well-being of their jurisdictions. Watch the video linked up thread for the details. It's damning.
The outside resources would have been made available had they asked, no doubt. They never asked. They never gave the people they had what they needed to quell the riots early on (less than lethal munitions), they sided with those who claimed victimhood based on lies, and even 'settled' with them while criminal court cases were pending.
That environment denied those selected as fall guys in that scenario their 6th amendment, 14th Amendment, and 5th amendment rights, which remains the case to this day. Only Kyle Rittenhouse got anything approaching a fair shake.
