We have the ability to digest meat but are herbivores by nature.
No, we're not herbivores by nature... We're omnivores. That's why we've been hunting and eating animals since before recorded history. Do you not realize how ridiculous you sound to try and posit the notion that something we've done since before the dawn of civilization is somehow "unnatural"? Do you not see the irony and inherent contradiction in that? It's stupid.
If you don't want to eat meat because modern technology has afforded you the opportunity to eat a balanced, complete diet of plants, then go for it. Hell, that's even somewhat commendable if you're doing it for ethical reasons! But for the love of god, quit running around trying to shove revisionist biology down everyone's throats by telling them that doing something we've done since we branched off into the homo genus, and even before we actually came to be homo sapiens, is unnatural. That is fu*king retarded.
Here's a known fact... The vast majority of the world's greatest athletes, both past and present, ate meat their entire lives.