Keep it to yourselves, JfJs.
Why? If you’re certain that Judiasm is the correct way and not Christianity, why are you afraid of Messianic Jews preaching the Gospel? If your religion is worth defending, then do so.
After all, what did Gamaliel tell the other Pharasees when speaking of Peter and the Apostles, you know, the original Jews for Jesus?
“...Refrain from these men, and let them alone: for if this counsel or this work be of men, it will come to nought: But if it be of God, ye cannot overthrow it; lest haply ye be found even to fight against God.” Acts 5:38-39