adara -

You appear to be mixing up several items here, so let me try to untangle them and then respond.

First of all,
Quote:
...worshipping that person is akin to idol worship
In Judaism we do not worship ANY person. We ONLY worship the G-d of Israel. Doing anything else, such as adding an intermediary that is worshipped, or giving G-d "partners" and worshipping them, or replacing G-d with other gods, is tantamount to idolatry.

Second, concerning true/false prophets, let me point you to this essay.

Third, concerning true/false messiahs, let me point you to this essay.

Please let me know if those resources were helpful to you.

UriYosef