We could go with malicious incompetence. Works for me.
The op was blown. The mailman got the word from a news crew that there was going to be a big raid, and called home. The Feebies had wiretaps, so they knew the op was blown. Evidence of the wiretap is heard on the tape of the 911 call from Mt. Carmel, where you hear the phone ringing noise, then the answer, "9-1-1". That could have only come from the side
making the call, and had to be produced by recording over wiretap.
That was one of the first holes in the official story, as was the bit about it being an ambush of the raid team. (With that much lead time, almost anyone could have planned a 'real' ambush, and virtually eliminated the raid before it got boots on the ground). It is the issue which led to the formation of concerned citizens groups across the country, coming on the heels of Ruby Ridge. The internet led to the exposure of other incidents, from MOVE in Philadelphia, to the Gordon Kahl bushwhacking (Medina, ND), and others, but it was Waco that got me on the web, and led me to FR long ago.