Um, in what way was his statement silly?
His statement: "Also, Einstein thought gravity was a constant, which is complete hogwash. Mass is just a variable as everything else."
First, his statement implies that the modern possibility of gravity not being constant is due to the variability of mass. This is not true and does not make sense.
Secondly, even considering the hypothesis of the gravitational constant depending on the particles involved, it's still a theory that hasn't been experimentally verified and so, as such, does not turn the notion of the gravitational constant being, well, constant, into "complete hogwash."