Charles Ellicott Commentary Jeremiah 2:15

"The young lions have roared upon him, and yelled; and they have made his land waste: his cities are burned up, without inhabitant." — Jeremiah 2:15 (ASV)

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 only figuratively, as symbolizing invaders, but also in the most literal sense, they had made his land waste (2 Kings 17:25).

Are burned. —Better, levelled with the ground.