> All these car had to of had thermite in them already.
This is why some cars burned and others didn't.
When we look at Maui, which has a more open landscape than NYC, we can see the aerial approach of dropping thermite as there were distinct burn line evidence remaining. This would state the the wind died down at that point while the thermite dust was dropped and explains why a car could be fried but a nearby fence, tree, or house didn't. On Maui the wind is a constant interim breeze usually less than 8 mph. This interim breeze on Maui is what prompted auto manufacturers like Infiniti and Mercedes to build air conditioning that mimics this most comfortable type of ventilation. The more that you know.