I think if your goal to to gain support from people who may have been propagandized on the topic into a completely pro-Israel stance from an early age, then it’s not very productive. On the other hand if you focus on the atrocities, the human rights abuses, humanizing the victims, pointing out Israeli dehumanizing of the victims, and an accurate history of the conflict, as well as citing leftist Jewish and Israeli sources to bolster your position, then you have a much higher chance of actually moving individuals and groups towards a leftist position here.

It also never hurts to remind people that, like most major conflicts throughout recent global history, this too was the fault of the English.