I like your tag, actually.
If you're not a Catholic, it may be hard to tell the difference between Catholic organizations—some of which are faithful, and some of which were, in fact, formed by non-Catholics to fight the Church's teaching, such as "Catholics for a Free Choice," founded by Planned Parenthood. We Catholics have no control over them, and it's an unlonged-for compliment that they feel the Church is so important that her voice must be co-opted. Obama's campaign formed an astro-turf Catholic group or two in addition.
Separately, various elite orders of priests and nuns, including the Jesuits and the Sisters of the Sacred Heart, were infiltrated by atheists, Stalinists, and modernists in the 20th century, and no more speak for the Church than Satan—who is an angel, after all—speaks for God. For instance, the Leadership Conference of Women Religious, which piped up in support of DeathCare shortly before the vote, has no teaching authority, and has been a heretical rubber-stamp of anything favored by the Soviet Union since the 1960s.
How little those two groups represent actual Catholics is indicated by, for instance, which nuns are getting the new vocations—not the old-line, Lefty orders, but the new, young, habited, conservative, orthodox ones, which have long waiting lists.
The US bishops' conference is usually useless—and like the nuns' group, has no teaching authority—but as a lobbying group, it did come out (too late) against DeathCare. The Church is not a corporation that quickly hires and fires, but her teaching is always clear: It is what is taught by the Pope and the bishops in communion with him, the Bible, tradition, and any approved catechism, such as Trent in 1575 or the CCC in recent decades. And her teaching has always been, and always will be, that good ends never justify sinful means. That means anyone who supports DeathCare and knows what he is doing is in for a warm hereafter.
Actually I am, and I frequently hear pleas for social justice from the pulpit along with exortations to help the "poor immigrants" (illegal of course). Several years ago one of our parish priests went into such a rant against GWB that about 1/4 of the congregation walked out in the middle of the mass. He was reined in a bit, but the monsignor scolded the congregation the next week for walking out. We're frequently told that we should not be prejudiced against "immigrants." (despite the fact that they're sucking us dry) and despite the fact that wanting them to follow laws is not prejudice. So there may be some catholic organizations that aren't hard left Marxist, but the main bureaucracy of the church is. Remember these guys aren't elected - they basically have a life appointment and don't really have to make anyone happy except their boss who is usually as hard left as they are.