There does seem to be more of a stigma to Jєωs converted to Catholic than any other religion...
"With troubled heart, We are reminded that many of those converted from the error of Jєωιѕн blindness to the light of the Christian Faith have fallen back into their former falsehood. Proceed with intensity against all who make themselves guilty of this crime, against heretics, and against those who support, protect, and defend them." ~ Pope Nicholas IV (the Bull, "With Troubled Heart," PAC, cf. p.659).