Prime Minister Benjamin Netanyahu said Monday that Israel will continue strikes on Hezbollah in Lebanon “without mercy,” a day after the Iran-backed militants launched a drone attack on an Israeli base that killed four soldiers. Netanyahu made the comments as Israeli jets pounded positions in Lebanon, including a house in the north of country where Health Ministry officials said at least 21 people died. “I would like to make it clear: We will continue to strike Hezbollah without mercy everywhere in Lebanon – including Beirut,” said Netanyahu at the Golani Brigade Training Base, which was hit b…