It depends on the upbringing, not on the sociotype or reinin dichotomy. Socionics is nice and all but useless when people try to apply it to complex matters like homophobia.
IME most alphas I've met are vegans but that does not mean that alphas are more likely to be vegan. It's a coincidence. Or if I try really hard: a correlation. But not a causation like alpha=>vegan