There have always been leftist idiots, so that's no surprise to me. What's really amazing is the hatred necessary to do such a thing, whoever it was and for whatever bullshit reason.
My theory is that they burned through their emotions leaving nothing behind. However as the saying goes, "Nature abhors a vacuum." So the emotional void had to be filled somehow and given how easily people give into the negative side of things.
And another thing, since you found it appropriate to split your words between two replies: work some humility into your thought process and control your emotions. If you believe that my word choice, which I chose to approach you in a calm and civil manner, is inhuman, perhaps you need to reflect on yourself instead of lashing out in anger as you’ve classically conditioned yourself to whenever you see the number “959”.