Hosea 10:7-8 King James Version (KJV)
7 As for Samaria, her king is cut off as the foam upon the water.
8 The high places also of Aven, the sin of Israel, shall be destroyed: the thorn and the thistle shall come up on their altars; and they shall say to the mountains, Cover us; and to the hills, Fall on us.

Hosea 10:7-8 Expanded Bible (EXB)

7 •Israel [L Samaria; v. 5] will be destroyed;
   its king will be like a •chip of wood[twig] floating on the water.
8 The •places of false worship [L high places of wickedness; or high places of Aven; v. 5; 4] will be destroyed,
   the places where Israel sins.
Thorns and •weeds[thistles] will grow up
   and cover their altars.
Then they will say to the mountains, “Cover us!”
   and to the hills, “Fall on us! [Luke 23:30; Rev. 6:16]”

Expanded Bible (EXB) The Expanded Bible, Copyright © 2011 Thomas Nelson Inc. All rights reserved.

These are my thoughts, please share yours.

7 So this kingdom would be done with this king dying. What most likely is that the king of Israel is wanting to set up his reign in Samaria but not only is it not going to move their, the king line would end.

8 These high places were where they did their idol worship, which was the biggest reason why God was allowing the kingdom to end, they were no longer being His people. For thorns and thistles to grow up means that they are not used for a long time being untouched long enough for them to grow. This would become the place of their judgment.