Because it's a false religion created by late 2nd Century/early 1st Century BCE Herodian/Pharisean/Idumean/Canaanite proselytes.
Convert to a faith created by imposters who hijacked YOUR ancestry, history, name, land and covenant? LMAO!
Even our "ADOS" brothers who have been over in the land for the past 50 years in Dimona and Tel Arad Israel never converted to Talmudic Judiasm, even though it would've came with added benefits such as full citizenship and the like...they seperated themselves from the Ashkenazi and their Babylonian customs, kept the Torah as it's supposed to be kept (for the most part) and created a healthy and relatively thriving self-sufficient community in the middle of the desert.
Meanwhile, Beta Israel (Ethiopian Israelites) who sold out and forsook their heritage and converted to Talmudic Judaism and integrated with the Askenazi are going thru hell with the Synogogue of Satan.
Psalms 55:22 Cast thy burden upon YHWH, and he shall sustain thee: he shall never suffer the righteous to be moved.
Exodus 23:32 Thou shalt make no covenant with them, nor with their gods.
Jeremiah 10:2 Thus saith YHWH, Learn NOT the way of the heathen and be not dismayed at the signs of heaven; for the heathen are dismayed at them.