President Recep Tayyip Erdogan of Turkey is threatening Israel in order to galvanize his base and strengthen his populist-Muslim appeal.

In the last few days, Erdogan has railed against the U.S. decision, last week, to move its Israel embassy from Tel Aviv to Jerusalem. President Trump’s announcement breached a “red line,” Erdogan says. According to Erdogan, Trump’s decision also renders Israel a confirmed “terrorist state” and makes the American leader a “partner in bloodshed.”