# because of you

Here "you" refers to the priests, prophets, and leaders. See the previous verse.

# Zion ... Jerusalem ... hill of the temple

Possible meanings are: Yahweh is speaking, respectively, of the royal palace, the places where the people of Jerusalem lived and did business, and the area where the temple was located or he is referring to Jerusalem as a whole three times.  

# Zion will become a plowed field

"Zion will become like a field that a farmer has cleared so he can plant it" or "Zion will no longer have buildings on it". Yahweh will allow the invaders to completely destroy Zion. 

# Zion

the royal palace in Jerusalem

# high places of a thicket

A thicket is a place with so many bushes that no one can use it for anything. The phrase "high place" refers to a place for false worship. The hill of the temple had been the most important land in Jerusalem, but now it would become useless.