@SallyStrange
I totally agree
Being capitalist means owning means of production.
And I get the fact that this is about people who do not own any means of production and yet adhere to the ideology and the whole situation.

What's following isn't necessarily on the spot. I'm 100% sure you don't need being reminded all non capitalists don't hold the same position in social hierarchies. I guess I'm just reformulating stuff I've read...

All this being said I feel like this makes too big of a group for "non capitalists".
Take for example managers or marketing agents, doctors or university teachers. In French we'd call these "Cadres" I think it's more or less "executives" in English. They don't necessarily own means of productions (stocks or whatever) but they do have a (short term self-centered) direct interest in capitalism and for most of them they very much enforce it. One way of understanding this is to see that they are paid way more than the actual value they create. So where does the extra value come from ? In part from other workers who are paid minimum wage (just enough to be in good enough health to keep working), underpaid or worse, in other part from all kinds of wealth transfers (not taxed much) and in other other part (however you make lists in english haha) from exploited beings whom we deem valueless (athough value generating human work is necessary to extract them) : mainly other animals, plants, and nature (include whoever dominant people want to exploit freely).
Now when you think of it, people that are paid above their actual contribution to value production and therefore have an interest in the exploitation of a whole bunch of other beings is larger than : only capitalists, or only executives. The middle class is there as well. And the middle class also has a set of cultural references and norms, ideological traits etc. of its own. In France this means sending one's child to one school rather than the other, like or disliking this or that etc. All of these values, cultural traits etc. are also exclusionary towards lower class people. A good example of this are teachers below university level. They don't have a salary as high as those of university people yet higher than minimum wage. And structurally they very much play a role in orienting (which includes exclusion) differently children on a class basis.
(Of course this train of thought also applies to other oppressed groups).
I guess I'm saying this because in France a large part of vocal leftists are middle class and above (mainly above granted) are like "we the people" when they actually represent a very narrow segment of non direct capitalist members of society. Which again I'm not saying your post is an example of !