No, they don't.
They are supercharged propaganda.
> but they're obviously incendiary, as is your 'veganism is unhealthy'.
Not at all.
Saying veganism is unhealthy is stating an opinion shared by many nutrition expert, it says nothing about vegans, it is just what it is.
meat is murder contains a judgement: if meat is murder, you are a murderer, if taxation is theft, who collects taxes is a thief.
I can accept "you eat corpses" because it's true, I don't eat animals alive, they are already dead when I eat them, but it is also imprecise, because I eat just bits of the corpses, not the entire carcass.
But also an opinion disagreed with by many nutrition experts
A majority of them studied and proved its unhealthy effects.
Unless you wanna say that every opinion counts, no matter the opinion, we can safely assume that being vegan is like drinking or having unprotected sex or speeding.
It won't probably kill you, it will even improve life for some, but it's not something one should take lightly like "it has no effects".
Both of those statements have some element of truth to them, but they're obviously incendiary, as is your 'veganism is unhealthy'.
For the most part it sounds like you're just lacking tact. I used to be that guy too. Probably still am, to some extent.