In the spirit of level 7: I use capitalised pronouns in all three grammatical persons
I don't think the Bourgeois created intentionalism, but I do think they're responsible for its prevalence in our modern society. The degree to which most people are concerned with intentions is so stifling, unhealthy, and unsustainable that I do not believe it can be natural. We live in an age of relatively little social upheaval. There are fewer revolutions and wars than usual right now, and that's not entirely a good thing. Look at the USA - they are in desperate need of a civil war, or we shall soon be fighting world war 3. Yet the people are far more passive than we would expect from history. Nonviolent resistance is also down, so it's not just military technology. It's propaganda.
I think intentionalism is a meme - an idea that through natural selection has taken on a life of its own. And because it helps the Bourgeoisie, they, perhaps unconsciously, create conditions that favour it in their media empires.