I understand your comment was tongue-in-cheek. The fear here, at least in my opinion, isn't that this movie will encourage violent actions, so much as it will give already violent people what they perceive to be an excuse to be violent.
I'm sure some will read my comments to say "all or most folks of a specific demographic are violent", but that would not be what I'm implying. If anything, it will be a small minority. But a small minority can still cause a decent amount of damage and a large amount of fear.