They were an anti-monarchist mob and were after Lavoisier because of his
involvement outside science with the much hated tax collectors of the
ferme-general in which he played a large part. He was killed because
people hated the tax collectors and their brutal henchmen. Back then it
was run more like a protection racket than a modern taxation system.

Exactly. Many of the rallying points of the French Revolution are consistent with what remains of 20th and 21st Century conservative US theory.

Current US conservative hostility toward the French Revolution and other milepoints in pre-industrial history have more to do with fanatical prejudice against the disenfranchised which has become the all encompassing goal of US conservatives.