That has to be the craziest thing I've read in years, simply on the basis of the comparison.
I have no problem with the idea that there are certain foods which could be unhealthy, but it's very difficult to attribute cause of death to any particular foodstuff, because 'what you put in your mouth' is a cumulative and rather untraceable process, which unfolds over a timescale of decades.
The millions - millions - who have perished in warfare and accidents had a definitely attributable cause of death, so it's like comparing 'a candyfloss fact' to a concrete fact. One statistic is real, the other one is being made up by someone who loves to sound dramatic, because drama is the only true substance in his words. And we all love a bit of theatre.
You can talk about the merits of not eating meat without sounding like a nutter and undermining the sensible basis of it. People can discuss many different aspects of it, in a way that makes it sound like a logical choice for anyone who likes taste and texture in their diet, without having to resort to scaremongering or insanity.