s/relations/elections/ -- because Elon et. al don't just intervene in the elections of the country they live in, but actually any country he's interested in -- and uses the U.S. as a bludgeon in that effort, see U.S.-U.K. and U.S.-South Africa relations
If a nuclear capable country like France decides that someone like Elon Musk is acting against the best interests of their country they can ask him nicely to stop and if he continues they can use force to reduce the perceived threat.
This all seems completely in line with the day-to-day norms of contemporary society as well as historical norms.
Well I've been against this regardless of owners. Honestly, this stuff is really concerning. I spent a bunch of years working in social media, and back then I was sceptical that algorithmic content selection should be regarded as publication, but given how easy it is to shift the Overton window with changes here, I think that it probably needs to happen.
I do think that this will cause lots of downstream impacts that I like, but this much power is bad in anyone's hands, regardless of how much I agree with them.