The fires by all accounts came from the BD's themselves so you cant blame the ATF for doing that and no they didn't throw fire bombs into the compound.
Information came forward after the event by BD members saying that this was the religious cults theological doctrinal plan, orchestrated by David Koresh himself.
It was obvious the ATF's final attack was overly brutal ( ie Tanks ) sheesh
It was also assumable that Koresh knew if the law authorities got him he would face the death penalty for killing ATF personal, so he wasn't going to come out the compound alive.
This was in Texas which has the death penalty especially for law enforcement personal.
He knew he had psychological control over the other BD members so he used that power to persuade his followers to die with him all the way up to heaven as it were.
I find is shocking that many here are dismissive to this person's actions for in reality the whole unfortunate and sad event that killed so many was really caused by him.
Without I am Jesus's personal messenger for all mankind delusional sociopath nutter, none of this would have ever happened.