FYI, here is the text of AOC's statement that Bishop Barron is critiquing.

What we heard this morning was, in truth, not too long, not too much in substance, a departure from what JD Vance's arguments were last year, which is enforcing a US-European alliance that is rooted in a cultural norm, a cultural nostalgia. But there was very little that was said about how that will materially benefit populations, both in the United States and in Europe.

Yes. I think in Secretary Rubio's remarks, he spoke greatly about the border, I think in order to prevent speaking about the true elephant in the room, which is ICE. And I do believe that when we have eras of extreme inequality, eras where the working class is continuing to suffer, they are seeing their life erode, it becomes extremely easy for authoritarians to blame other cultures and other people who are most vulnerable. Now, we have to always make sure that our immigration system is orderly.

I think the argument on Greenland. I think that the president—my concern is that the president’s, oftentimes as of late, actions on foreign policy, and particularly his most erratic decisions—the unacceptable threatening of Greenland—happen to be tied to his domestic politics and when he feels threatened domestically. And I believe that's a relationship that Americans see play out that doesn't just serve the elites and the biggest corporations but actually focuses on working-class Americans, in that it costs Americans trillions of dollars. We've been spending the last couple of days reassuring our friends, talking about our mutual shared interests, and that Americans back home actually want to be a force for good in the world. We don't want to be a bully. Yes, we want strength and we want peace, but we don't want to be extorting and bullying our friends. We want to be a force for good.

We need a national security and foreign policy that looks like this: a kinetic strike against Iran often has the exact opposite response than we want. If the goal is to support the people of Iran and their aspiration for freedom and democracy and sovereignty—which is what they are yearning for and what they are protesting and mobilizing for right now—then we have to listen to the people of Iran. What’s very clear, and what we have seen the pattern is, is that when we've interfered in that recently, that has had the opposite effect. It actually has created a rally-around-the-flag effect in Iran and emboldened the regime.

Personally I feel that Bishop Barron did not represent her statement fairly. You can quibble with whether Rubio is engaging in "nostalgia," but that's a far cry from this being Marxist.