If you are willing to attack your fellow man, then you are weak as well. It's that simple.

Every time you've made a mistake, you were weak. Every time you didn't know something, you were weak. Every time you stand back and fail to do anything of substance to stop the onslaught against us, you are weak.

Because the fact of the matter is that we are all weak to various degrees and at various times, and if we abandoned each other in our times of weakness then humanity would have already collapsed.