During much of the time over the last two millennia, if a Jewish person wanted to believe in Yeshua as Messiah, he or she was forced to publicly confess something like this Jewish Conversion Liturgy. Prepare yourself—it is shocking!
“I do here and now renounce every rite and observance of the Jewish religion, detesting all its most solemn ceremonies and tenets that in former days I kept and held. In the future I will practice no rite or celebration connected with it, nor any custom of my past error, promising neither to seek it out nor to perform it. Further do I renounce all things forbidden or detested by Christian teaching; and (recitation of the Nicene Creed).