Matthew Poole and continuators on Jeremiah 51:51

51 We are confounded, because we have heard reproach , shame hath covered our faces: for strangers are come into the sanctuaries of the LORDs house .

The words of this verse seem to prove that the Iews were the Persons intended in the former verse whom God would have to go away, and not to stand still, for it is out of doubt, that it is of them the Prophet here speaketh, and whom the Prophet brings in here, saying, we are confounded, that is, ashamed (as it is expounded in the next words) to hear the Enemies reproaching us, for our God, or for our Religion, as Psal. 137.3. And

because Pagans that were strangers to the Commonwealth of Israel, who Numbers 1.51. might not come near the Tabernacle of the Lord, were come, and that not to worship, but to plunder and rifle in the Sanctuaries of the Lord, even into the Court of the Priests and of the Israelites, and into the most Holy Place, those whose very presence in these places had been a pollution of them.