Some people can handle being vegetarians and their body can compensate for the lack of certain brain proteins that are needed for rational thought...
Some people in the far east and in india come from multiple generations of vegetarians who have acclimated their bodies to using plant onky proteins...
For Europeans, every damn vegetarian I have had the misfourtune of comming across with european ancestry has been insane, dull witted, or a combination of the two....
Raw Vegans are EVEN WORSE, as cooking actually releases ceertain nutrients and they are lacking even more nutrients...
I know lots of vegetarians also. It seems that many of the very strict ones end up with either diabetes or cancer. In my experience of just silently observing them,they seem to eat a lot if sugar and empty carbs. (Ie, if at an event where lunch is served and no veg options available, they will eat bread, cheese, salad, French fries and cookies, plus wash it down with gallons of caffeine for energy. That will eventually catch up with them, but they won’t hear it.)
This I believe.
George Orwell also noted something similar.
“One sometimes gets the impression that the mere words ‘Socialism’ and ‘Communism’ draw towards them with magnetic force every fruit-juice drinker, nudist, sandal-wearer, sex-maniac, Quaker, ‘Nature Cure’ quack, pacifist, and feminist in England.”and
"This kind of thing is by itself sufficient to alienate plenty of decent people. And their instinct is perfectly sound, for the food-crank is by definition a person willing to cut himself off from human society in hopes of adding five years on to the life of his carcase; that is, a person out of touch with common humanity."