For my own learning (not trying to argue), can you list some of those basic facts of property rights?
morality
Agreed. I wasn't saying morality is pointless or worthless or anything. Even myself, I often 'do the right thing' on impulse rather than reason. I'm pointing out that morality is an idealistic structure, referencing the ironic appeal to morality from someone who was trying to critique Marxism for being an "idealist ideology". Morality is so subjective and unquantifiable it wasn't even worth arguing against their silly comparison.
It is a powerful tool, although I must admit I have serious issues with the most common frameworks of morality I see today, being framed as absolute rules a vacuum. And like you said, moral arguments can have excellent rhetorical power, and moral righteousness is a powerful motivator. The bottom line is, what anti-capitalists try to do fits into most moral frameworks as clearly good, and that's great!
Even putting aside biases or conspiracies, mass media and (for-profit) social media has an economic incentive to get people passionate and interested and viewing more ads. So there are systematic factors at play, which I'd say are enhanced by digital technology.