Really?
The ATF had a warrant. They knew they were ATF agents.
If you really want to argue the illegality of a warrant, then you do that in court, not by shooting it out with ATF agents, and then committing mass suicide when you know your cult leader is going to prison.
Uh, yeah, given that this is Utah, we are probably talking Mormon Cultist... so she'd have sat their and taken it.
Have you seen the warrant? I have. Not one item that was listed was illegal in any state of the country.