Who were like this to you?
Radak: Your Chachamim.
Malbim: All your toil was like straw that burns immediately. [Your toil] was consumed quickly immediately, at the beginning of the war.
Why does it say "Asher Yagat"?
Radak: You toiled that there should be Chachamim among you - witches and astrologers - and they did not help you in your affliction.
What does the verse teach about "Socharayich mi'Ne'urayich"?
Radak: They did business in this land for many years. At the time of your affliction they fled the city.
Malbim: Sometimes the capitol falls from its grandeur, but it remains a commerce city, and merchants who used to trade there continue to do so. Here, Bavel did not leave a coal - all your merchants went elsewhere.
What is the meaning of "Ish l'Avro Ta'u"?
Rashi: Each man to his path, in front of his face, [he strayed].
Radak: This one fled to the east, and this one to the west, like people who stray on the path, here and there. They were confounded and confused amidst fear.
Malbim: Refer to 47:15:3:3