they mocked = they kept mocking. Compare Mat_23:37. Especially Urijah (Jer_26:20-23) and Jeremiah 37 and Jeremiah 38.
God. Hebrew. Elohim.(with Art.) = the [true] God. App-4.
no remedy. These words, occurring as they do on the last page of the Hebrew Bible, led to the conversion of the late Joseph Rabinovitch, of Kischeneff.