I appreciate the input but it didn't answer the question at all.
I wasn't asking if it is cool to practice those methods, I was asking if Buddha taught the methods!
For eg, vajryana teachers I have met have proclaimed that the historical Buddha taught the vajryana methods. I have even read that Buddha taught the methods to specific householders.
What I am asking is if this is correct and if so what sutras are the methods explained in?
My assumption is that these traditions like to proclaim that the teachings are from the historical Buddha, by even going as so far as saying that it is our Buddha-nature that is the source of the teachings (regardless of who actually taught it, similarly to the heart sutra) so by proxy that it was the historical Buddha who taught the methods, as a homage.