And they are lenient - if you go to a Catholic university, you will find lots of undisturbed Marxist professors. Hell, even in Catholic parishes you can find Marxist priests.
Only for a very narrow definition of "undisturbed."
The definition of "undisturbed" here is "attacks the Faith and no authority complains".
And there is more than one way to force someone out of an organization than take official action.
Be specific.
In fact, even the USCCB issues very progressive statements on immigration, the environment, the death penalty, government welfare and most other issues.
War, capital punishment, poverty: occasional letters.
Homosexuality, abortion, contraception: months-long, well-funded, nationwide lobbying campaigns.
1) Because the government is trying to force the Church to pay for abortifacent devices.
2) Because the right to life and family values are part of the deposit of Faith, while those other issues are prudential judgments.
Nobody was ever denied communion for a war vote.
Again, learn what is a prudential judgment.
And it is extremely rare for a pro-abortion politician to be denied communion.
They're not "asking" anything; they're sending in bishops to tell them what to do.
The bishops have done nothing so far. And considering the extreme leniency that the Church extends to even worse heretics (such as the Latin American Liberation Theologians who defend Marxist oppression and political murder), I think the Church will be gentle.
And the Church is absolutely right to do this. Claiming to be a Catholic while attacking the Faith is simply dishonest.
I assure you: if the spokesperson of Greenpeace started defending mass deforestation, he would lose this post.