Anti gun people are afraid of the AR15 because it looks scary.

No.

I am afraid of the AR15 for four reasons, none of them have anything to do with how it looks.

1. It is a device made to deliver flying metal with high accuracy and is optimized for accuracy and high cycle rate

2. Its cartridge, the 5.56x45 uses a spitzer-shaped bullet, chosen for combat due to its flight performance and tendency to yaw in soft tissue resulting in dramatic wounding effects

3. You. I'm far more afraid of you, the asshole with an AR15, than I am of the rifle. When I see a cop or soldier similarly equipped, I'm not filled with fear and dread. When I see your fat, drunk, hillbilly ass following muslims to church and hanging out in front of Planned Parenthood intimidating people with your freedoms, I am justifiably afraid. Of you. Killing me.

4. Because of the implication - as a post here so eloquently put it. Gunnits are trying to say something without talking, and that something is "Disagree with me and it could be the last thing you ever do".