The logic is this

So the 'logic' is that if any individual from another group hurts any person in your group then you have the duty to kill every man, woman, and child in his group. This applies even if the individual who caused harm from that group was responding to harm caused by an individual  from your group.

Anybody who doesn't agree with this is an anti-Semite, a Jew hater, or a self-hating Jew, a leftist, a fool speaking nonsense, or a terrorism supporter, or any other label that's in fashion.