EDITED>>>When people do 'shady things' (corruptions, tricks/schemes, etc.), it bothers their conscience (whether they know it or not it doesn't sit right with their conscience), SO their conscience "WEEPS" and makes them uncomfortable about themselves (SO they grind/gnash their teeth upon introspection).
Where do people "weep and gnash their teeth"?.
They are hypocrites because they say be righteous and good, but they do just the opposite.
The creator is a master philosopher (after all) He created us).
THE JEWS were sons OF THE KINGDOM of God, they were not SONS OF GOD like we are supposed to be (WE are not to be SLAVES/SERVANTS of God, we are to be SONS of His "Abba Father" is the spirit of SONSHIP, Romans 8:15).
Mat 8:12 while the sons of the kingdom will be thrown into the outer darkness; there men will weep and gnash their teeth."
THIS is where the hypocrites go...
Mat 24:51 and will punish him, and put him with the hypocrites; there men will weep and gnash their teeth.