Since your arguments seems nigh incomprehensible, I traced it back to where it started:
To answer your initial question: Our canines are sharper than our other teeth (namely our molars). They exist for the purpose of eating meat. Are they "sharp" relative to most pure carnivores? No, or course not. We're omnivores. Also we have, for a long time, learned to use tools (weapons to kill, cutlery to eat) to do what carnivores rely on their teeth for, so our canines have presumably been getting smaller over time.
I suggest you stop fixating on this argument because it's utterly pointless since it in no way affects the original point you were replying to (also, you don't seem to understand what those replying to you are trying to say, nor are you presenting your argument in a cogent manner, so they can't understand your viewpoint, meaning you're talking past each other)
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The issue is that the choice to be vegan is generally driven primarily by a moral decision to not exploit animals. For people who aren't vegan, that comes across as being highly judgemental (regardless of whether it's actually true or not).
And given that our bodies are ostensibly designed to consume animal products, it's understandable that people would get defensive when they feel judged for doing so.