Britain's way of dealing with the IRA wasn't killing Irish people by the hundreds while hoping that some of them might be terrorists. Spain's way of dealing with ETA wasn't killing Basque people by the hundreds while hoping that some of them might be terrorists.
If you think that neither Britain or Spain would have been justified in brutalizing the Irish or Basque populations, but you think that Israel's disregard for the lives of innocent Palestinians is justified, you're just a racist tool.
Tool is slang for penis outside the US. Like Dick, Knob, Bellend. It’s why the band Tool have that penis shaped spanner on one of their album or EP covers.
Is it an unreasonable position that if the IRA launched an attack from a school, then a counterattack is justified even though it would have killed Irish kids, but that unprovoked attacks against Irish civilians would be unjustified?