# stood aloof

"watched and did nothing to help"

# strangers

people from other nations

# his wealth

The word "his" refers to "Jacob," which is another way of referring to the people of Israel.

# cast lots for Jerusalem

This phrase means "they cast lots to decide who would get the valuable things that they took from Jerusalem." 

# you were like one of them

"you were like one of the enemies and did not help Israel"