I ignored the accusations against the Davidians because they are irrelevant to the issue of whether the raid was conducted legally.
The BATF spent days planning for a no-knock raid. Although there are occasions when warrantless no-knock raids may be justified by exigent circumstances if there is no time to consult a judge (e.g. an assassin is seen to flee into a building and bolt the door) clearly there would have been time between the decision to conduct the no-knock raid and its execution to get a no-knock warrant to actually authorize it.
The BATF did not have a warrant that authorized them to conduct the raid in the fashion they did. There were no exigent circumstances to justify the lack of a warrant. IT DOESN'T MATTER what the Davidians were accused of; the government's raid was a crime and the agents who participated are responsible for the deaths occurring therein.
How convenient for you to continually ignore the fact our government illegally/unconstitutionally prohibited manufacturing or possession of 'certain' weapons, and then instituted a deadly unconstitutional raid to enforce their decree.