Re: Have you ever killed some innocent lives/animals,like a butterfly or a rat ？
Not 2B sarcastic, but anyone who eats meat arguably has in a "collective sense", by helping create a market for their flesh. Wearing fur coats, goose down parkas, etc also. Arguably, wearing leather belts and shoes is not, as leather is a byproduct of the cattle industry, and there aren't good alternatives that I know of. And yes, I know: most farm animals are only born to begin with 2B slaughtered later. (Or exploited for milk, eggs, etc).
My current avatar (NFL Commissioner Roger Goodell) needs fired!