Kent and Little Hawk, you err in thinking that observant Jews think "their religion is the 'right' one and and the other religions aren't." There may be some individuals or groups who feel that way, but I don't believe this is a tenet of 'normative Judaism.'

If by 'observant' you mean 'Orthodox', it still doesn't apply. Orthodox Jews believe that their observance is 'right' vis a vis Reform or Conservative Judaism, but not as concerns the validity of outside religions. It is not necessary for the whole world to be(come) Jewish in order for the Messiah to come, only that the people of the world be good.

BTW, I belong to a Reform congregation and consider myself an 'observant Jew' within that construct.

JotSC (Jonah ben Avraham)