Encouraging the Palestinians to accede to the ICC, which they have been eligible to do since attaining Observer State status at the UN in 2012, would introduce an accountability mechanism that would deter future violence. It would also provide an incentive for each side to stay at the negotiating table.
Listening to Barack Obama and Benjamin Netanyahu speak about Islamist terror threats in Middle East, it is clear that the international community's determination to fight Islamic State (commonly known by its Arabic acronym "Daesh") essentially parallels Israel's determination to fight the Islamic Resistance Movement (commonly known by its Arabic acronym "Hamas").
Apparently we are presented with two monochromatic sides of this argument, Team Israel vs. Team Gaza, and failure to select one on the basis of who is or is not a terrorist means that your opinion is unlikely to rear its humdrum head in mainstream news or grant you a few thousand followers on Twitter.