A Provocation to Jealousy

There has been a great debate and dissention in the Messianic Movement for quite some time now. It has to do with non-Jewish believers embracing the Torah. Many Jewish believers in the Movement are opposed to Gentile observance of Torah, calling the Torah a "Jewish Identifier." But are they right in saying this? Perhaps the opposition is due to something else and these Torah-observing non-Jewish believers are doing something else to provoke such a reaction from their Jewish counterparts? Perhaps this is evidence of something that the non-Jewish believers in Yeshua should be doing: that is "provoking the Jews to jealousy." If it is evidenced in the reaction by our Jewish believing community, could it have the same effect on the Jewish non-believing community, too?