That statement is rubbish.
Israel has been indiscriminately killing Palestinians even before hamas inception. Hamas is an excuse now, Israeli leaders openly say Netanyahu helped hamas to weaken fatah.
Also Hamas does not represent all of the Palestinians the Israeli leaders do represent their people, so again your statement is flawed.
If Israel created Hamas, why then are Muslims supporting the terrorism of Hamas madly?
Why don't they declare Hamas to be terrorists?
Why don't they declare Iran and Hizbullah to be terrorists for supplying weapons to Hamas?