Holy shit, you are both stupid and a fucking liar.

Thermite burns, it doesn't explode.

Not only that, but thermite is a very inefficient reaction and it burns down. It would take a shitload of thermite in all the key areas, it wouldn't have been even remotely easy to install without basically disassembling the entire interior and parts of the exterior.

"I am in construction and do demo", I assume that means you reshingled a roof and one time you used a sledgehammer to knock out a wall.