Israel does not need EU support at the UN. It already has the unconditional veto from the US. If the EU wants to make Israel comply with International Law, it has to use its main asset: trade. The EU is Israel's main trading partner, and has granted it preferential status through association agreements. The only threat that will work is downgrading those relations, or even canceling the agreements. Grow some teeth!!
Hungary's Orban: Refugees threaten Europe's Christian roots (Reuters)