I don't think it's a good idea to come to something because of ideology or religion, you should reach a conclusion based on your research or study. I don't see any reason to see humans consume as much meat as they do. I wouldn't call myself a vegetarian but I'd say I've reduced my meat consumption to the point where a person would almost think I'm a vegetarian, I have meat around 2-3 times a week (can't resist bacon).
I think we do need a BIT of (or byte!) meat for complete nourishment but I see no reason why humans particularly in developed countries need to eat it as much as they do. The typical justification I get for people eating as much meat as they do is "nourishment". A cursory look at the medical literature would tell you their reasoning BS. We only need meat in small quantities, the majority of Brits just overdose on the stuff: excess protein for the sedentary people that we are while we **** out the rest.
It's wasteful when you consider the ecological and economical aspect also. I'm fairly convinced having looked at the medical literature that it's feasible to live healthily on a vegetarian diet for the vast majority of the population, I'm not convinced that veganism is healthy. There are the odd few people that can't be healthy on a vegetarian or vegan diet. I'm not "religiously" bound to vegetarianism but I'm convinced that it's far superior ethically, economically and ecologically, nothing wrong with the odd scrap or two, our physiology demands it.