The second part that is wrong is that Jews can free themselves of these curses - they simply have to accept Jesus Christ as Lord and Savior, receive baptism, and they will be forgiven. This is because Christ says the only unforgivable sins are against God and the Holy Spirit - blasphemy against Christ can be forgiven (all in scripture, easily googable).
That is why it is always amazing at to which lengths Talmudic Jews will go to deny and avoid Christ, often they will go to the death before converting, their hatred is so strong. Completely committed to the Devil.