The young lions roared... — The real answer to the question, that Israel had forsaken its true master, is given in Jeremiah 2:17. Here it is implied in the description of what the runaway slave had suffered. Lions had attacked him; not figuratively only, as symbolising invaders, but in the most literal sense, they had made his land waste (2 Kings 17:25).
Are burned. — Better, levelled with the ground.