As I said in another post, the OT stands as a witness to all who would attempt to practice whatever modern "Temple-less" Judaism (a misnomer I grant) is possible.
Sounds nothing like accursedness to me...
You're referring, I presume, to the so called Old Testament Jews who claim to practice non-Talmudic Judaism today. This is also an offense to God, since it is in the spirit of anti-Christ. Christ said that any who deny that he is the Messiah (Christ) exhibits the spirit of anti-Christ. This refers most particularly to those identifying themselves as Jews, since (besides Christians) only Jews believe in such a thing as a Christ, and thus only a Jew can formulate the notion of denying that Jesus is he.
