John Calvin Reformed @genevareformer

Now follows the cause; the Prophet, after having shewn that Israel were forsaken by God, now mentions the reason why it so happened, Has not this done it for thee? Some read in the second person, “Hast thou not done this for thee?” but the meaning is still nearly the same.

Matthew Henry Presbyterian @wholebiblehenry

The prophet, further to evince the folly of their forsaking God, shows them what mischiefs they had already brought upon themselves by so doing; it had already cost them dear, for to this were owing all the calamities their country was now groaning under, which were but an earnest of more and greater if they repented not. See how they smarted for their folly. I.

Commenting on Jeremiah 2:14-19

John Gill Reformed Baptist @doctorgill

And now what hast thou to do in the way of Egypt,.... By worshipping of idols, in imitation of them; or by sending ambassadors thither for help, when they had their Lord, their God, so nigh, had they not forsaken him; nor had Josiah any business to go out against Pharaohnecho, Ch2 35:21 and, contrary to the express word of God by the Prophet Jeremy...