There’s a big difference between funding organizing groups like Indivisible (which, yes, foundations linked to Soros do - although I suspect not at the magnitude you’re imagining), and directly paying protestors (which doesn’t happen to any notable degree)
Want to understand this? Go to a local Indivisible or Democratic Party meetup and you will see the normal people with your own eyes. Go to a big protest like ‘No Kings’, or a rally during campaign season and you’ll be surrounded by ‘normal people’.
I’d personally be fine with restrictions on where funding for political organizations comes from (although I’m not sure how you make that compatible with the 1st amendment) - but what you’re saying is ridiculous, and it’s a worrying symptom of our current political climate that people can be so out of touch as to believe it.