The pro-Iranian Hezbollah movement vowed Friday to escalate its attacks against Israel in southern Lebanon, one day after Israel announced it had killed Yehya al-Sinwar, the leader of Palestinian extremist group Hamas, which is allied with Hezbollah. Lebanon-based Hezbollah said in a statement that it was announcing “the transition to a new and escalating phase in the confrontation with the Israeli enemy, which will be shown in the events and developments of the coming days.” The Hezbollah statement came hours after Israeli Foreign Minister Israel Katz confirmed the death of al-Sinwar, Israel’…