So setting aside how the war was with Egypt, not Palestine, occupied people still have a right to resist against their occupiers. If you have a problem with that take it up with the UN. And this is before getting into the whole human rights violations and Apartheid thing.
TBF it’s more than just the lack of lobbyists; that’s the rest of Europe. Ireland and Palestine have a long history stemming from both being victims of British settler colonialism.