So according to you, all the male individuals Israel killed in this war of fighting age are Hamas fighters? That’s very convenient to believe but it is far from the reality.
In Gaza, before the 7th of October the Hamas military division was supposed to have 30K fighters. Israel has been proven to use unguided munitions and a lot more powerful bombs than they should.
Even considering that all of their targets were legitimate, which I am pretty sure wasn’t the case claiming that they killed 10K is extremely presumptuous.