Half of the stuff this guy say's is simply not true. THC is a medicinal part of the plant, research shows THC works in harmony with CBD (Rick Simpson Oil anybody?).
And was Indian Charas 1% THC in the 60's? Like fuck it was.
It's way more likely the governments want to breed the THC out of the plant so it looses it's magical properties to Human Beings.
This dude probably had a major whitey after toking on a zoot at college and is now on a mission to spout some bullshit about THC being a bad thing.