I would propose that a man who owns 1% in each of 100 slave plantations is no different to a man who owns 100% of a single slave plantation.

I would propose that if owning a slave plantation in the 18th century would have been a morally objectionable way to build capital, then things are not really any different today when engaged in business investments.

If you build income doing things that are harmful to the world, then you are morally responsible for that harm. I have the impression from your post that you don't consider yourself morally responsible, but wishing something so, does not always make it so.

I would propose that those who cheerfully and knowingly draw income from damaging their own society, are not patriotic.

I would propose that "If indeed they are damaging democracies, then said democracies should look in the mirror" sounds rather like 'victim blaming' and 'false equivalency' and 'whataboutism'.

To each his own, as you say.