[pepsi_junkie]

The roof had a bunch of gasoline cans on it which were clearly visible from aerial surveillance. These of course ignited violently when they dropped the "entry device" a.k.a. bomb. I remember the police chief arguing later that gas cans don't always contain gas, he has several that contain water. So naturally, drop a bomb on gas cans and hope for the best.

The mayor who ordered the whole raid was black though, so it doesn't count as a "black lives matter" moment.

[DesertRhino]

This group had murdered one cop last time they were evicted after a year long standoff. And there was a fortified bunker on the roof.
Loudspeakers were blaring revolutionary political messages all night long. They did not believe in sanitation, so they piled their garbage wherever they created it, like cavemen.
They thought pest control was inhumane so their neighbors were treated to cockroach and rat infestations that could not be stopped.

Police moved in to evict them after a court order. They were correctly prepared for war because last time that happened it turned into a year long stand off after the first cop trying to simply serve an eviction order was shot in the back.
As they conducted this latest operation and standoff, it was too dangerous until that bunker on the roof was taken out.
Police are not designed to go up against pillboxes. If you build one and murder cops, you can expect unusual responses borne partly out of not really knowing exactly how to approach it.