Originally Posted by Resurrection

Honestly I'm not sure if you're just trolling me because you realize you're wrong or, just lazy, but please explain to me why Columbine would change how this situation is dealt with. Pretend that I'm a child and really boil it down to basics.

I get that you're saying that police now supposedly don't wait for backup (citation required) but how does that change how they would handle a knife wielding perp? What imminent threat does he pose in the same way someone with an assault rifle pose? The video shows him leaving people alone as they walk by and when the police show up he is alone, with no one near him but the police.

The columbine reference makes no sense. Sorry.