Gotcha. Gestures get to you much more than they do to me. Especially when it is from a stranger that I would probably never have direct interaction with ever again.The throat slit gesture is immediately penalized in football and a technical foul assessed in basketball. It is not accepted. And yes, if someone gave me that gesture directly I would react much in the same way I would if I was flipped off.
Again, in the end, most of the argument over AJ here is opinion. I openly admit that my opinion about "gestures" may be much more desensitized than others. If you think an athlete flipping the bird at booing fans is "that bad", I disagree, but I understand how different things bother different people...