I think it was more the government agents killed them all to keep them from contemplating mass suicide.
At about that time I found in the post office here some pamphlets on religion. I read them and realized they were from a Missouri sect of the Branch Davidians.
There was nothing in all that writing about committing suicide or violence, just a call for people to return to their religious doctrines of the Seventh Day Adventist church of which the Davidians were an offshoot.