Only an actual fascist would call a party that would be considered a moderate conservative party anywhere else in the world, marxist and progressive.
This gets said a lot on slashdot, but the truth is actually more nuanced. There's areas where the Democrats are quite conservative, but others where they're more progressive than most. Calling them Marxist is silly, calling them socially progressive is not.
Take, for instance, two hot-button Democratic issues in the US today: abortion and gender dysphoria. Roe vs Wade is a more pro-abortion ruling than the comparable laws of many European countries. Affirmative care for gender dysphoria in minors is also very progressive, and (off the top of my head) is not practiced in the UK and parts of Scandinavia, possibly elsewhere as well. I'm sure you could find other examples where the US Democratic position is more progressive, sometimes significantly so, than much of Western Europe.
My impression is that US political parties are predominantly divided on social issues while Western EU parties are more divided on economic issues. The US mean economic view falls to the right in the EU, while the EU mean social view is falls more in line with a moderate Democratic stance than a progressive one. This is why, for example, the "Liberal" party is generally a right-wing party in the EU: they're taking classic liberal economic stances, as opposed to the US where liberal refers to social policy.