# Do you see what apostate Israel has done?

"See how apostate Israel is!" or "You see how apostate Israel is."

# She has gone up

"Israel's people have gone up" or "They have gone up"

# every high hill and under every leafy tree

"every" is used as a generalization to show that the people were worshiping idols in many different places. The tops of hills and under shade trees were common places for people to worship idols.