"A millimeter wave scanner is a whole body imaging device ..
Clothing and other organic materials are translucent in some extremely high frequency (millimeter wave) radio frequency bands. This frequency range is just below the (related) sub-millimeter "Terahertz radiation" (or "T-ray") range."
Seriously now. What ?
You just pasted that from Wikipedia. The thing you are talking about is one of these
So in summary your argument is that because they didn't come down the ropes carrying (or perhaps inside?) one of these babies that they were obviously just out to shoot protesters.
Well, that's convinced me.

