probably best example: some "Catholics" vote Democrat even though the Church teaches that promoting abortion is a mortal sin. But then, priests rarely if ever PREACH that, so...
O.k., but lots of Catholics vote Democrat not because they support Abortion, but because they support Labor Unions, which provide decent wages for tradesmen, so that they can support families. Furthermore, despite the rhetoric of the republican party, it is hard to believe, given the actions of their appointees to the supreme court, that they are truly anti-abortion. Since Reagan, according to Pat Buchanan, who was a member of The Reagan Administration and a Catholic who attends a latin mass, The Republican Party has been dominated by Neo-Conservatives, which are basically pro-war liberals.
In any case, that's politics. What really matters is the rejection or acceptance of Christ. Catholics accept Christ and call Him Lord and Savior; Jews reject Christ and call Him a bastard and the son of a whore, who burns in excrement for all eternity. Catholics love Christ, while Jews hate him.
Scour the world for an exception to this if you want to, but so what if you find one? Who cares? You might as well say, some apple trees don't bear apples. O.k, but so what!