Your first argument can be turned around in the exact same way. #notallmen are trying to isolate a pattern, so that it can be brought out to the daylight where it can be addressed. Bit of a crass analogy, but maybe you get the point.
Your second argument is indeed a great analogy - except for one tiny little fact. In that case, I wouldn't be handed the M&Ms - I'd be one of them. And as such, I'd definitely focus on the fact I'm not poisoned.
That said, thanks for the discussion. Feel free to reply, I'll read it, but I won't spend more time on it for the sole reason that my day only has 24 hours.
I really enjoyed the discussion and you're one of the very few who can argue in a factual and non-emotional way which is rare when it comes to this subject.
Thank you and have a nice day :)