Crack-Pots
Does anybody really believe that a wind gusting to a maximum of 48 MPH could pit a windscreen sufficiently to make them crack - courtesy of some fine grit?
.
And do it on all four windscreens of the one parked jet (by artfully and deviously turning around corners)?
.
I've flown low-level through heavy desert sandstorms and arctic blizzards at 400+kts with nary a scratch on a heated windscreen.
.
For the pressure concept, think "square of the indicated airspeed" folks.
.
This is all about heating from cold-soak and how you go about it.