“Why is it so many liberal, pro-gay, pro-abortion politicians are Roman Catholic”.
The same reason so many are protestants. Calling yourself a Christian just because you were baptised no more makes you a practicing Christian than working on your car in the garage makes you a master mechanic.
Hypocracy cuts through all denominations.
I think it is a given that professing the Christian faith and exhibiting a changed life through the fruit of the Spirit are not always simultaneous. No one is arguing hypocrisy is a Catholic-only character trait. But to challenge you a wee bit more on this point, why don't you identify all the Evangelical "Protestants" in the world of politics who are liberal, pro-gay and pro-abortion? Do any particular names just pop immediately to the surface like the ones that identify as Roman Catholics do? You know, like any of the Kennedys, the Cuomos, the Kerrys, the Pelousies, Biden, and so forth?
I bring up Evangelical Protestants simply to demonstrate that that sets Christians apart from those who claim membership in many of the mainline Protestant denominations - and which many HAVE departed from the faith and you'll get no argument from me on that.
But the subject of this thread was the "sins of the fathers" - meaning the bishops in America - who have stood by while liberal politicians, who identify as Catholic, thumb their noses at all the social issues their church has deemed right and do so blatantly, while for all practical purposes, moving in the exact OPPOSITE direction furthering the decline of morality in this country. Why not direct your ire at them instead of working so hard to incriminate everyone else as "just as bad"???