There were no Jews in Makkah that were killed by our prophet.<quoted text>Muhammad committed genicide against the Jews in Makkah, and Medina.
In Madina there were three tribes of Jews, with whom prophet had made pacts of Non Violence and Common defense.
Two of the tribes broke their pacts and after a brief siege, were ordered to leave Madina. There was hardly any massacre.
The third tribe, broke their pact unilaterally , when Madina was under siege by an army of 10,000 , the largest army gathered in Arabia of those days.
Muslims were trying to protect their small city of Madina by digging a trench and monitoring it day and night.
The Jewish tribe was at the back where Muslims had placed their women and children.
It was at this critical juncture that Jewish tribe broke their pact without any warning and threatened the very survival of Islamic state.
After Makkans army left, prophet laid a siege on them to punish them for their act of Treachery.
After a brief siege, the Jews agreed on the name of an Arbitrator who shall decide their fate.
The Arbitrator pronounced his judgment, that Jewish law of war and surrender as mentioned in the Book of Numbers Chapter 20 be applied to them and it was applied.
If Jews had surrendered themselves to prophet and asked for his mercy, may be he would have pardoned them....but they lost their way in the end.
There is a saying in Sanskrit "VINASH KALEEN, VIPRIT BUDDHI"
I.e. when the end arrives, your thinking is reversed.
It seems the same thing happened to Jewish tribe of Bani Quredha.
They have themselves to blame and their own scripture to blame!!