I am generally one who likes to admit all comers, regardless of their opinions...and let the best ideas win.
But I have changed my mind (recently) on Twitter a little bit.
As to whom decides whether it is propaganda or conspiracy theory on Twitter, I think it has to be Musk himself so that only one person can be held responsible.
As you say, I do trust people to make up their own minds. That's the only way.
That said, I think Musk is worried--initially at least--about the system getting clogged up and overwhelmed with propaganda and conspiracy theories to such an extent that real free speech cannot find a space.
As said above, I am trying to feel my way through this issue carefully and am open to a change of mind as the new Twitter progresses.
I also think Musk refused to reinstate Jones as a signal to potential users who were (perhaps unjustifiably) concerned about differing opinions being inflammatory. Our country right now is a tinder box of vastly different ideas (those on the Left being absolutely frikken insane). But somehow Musk has to entice people of all opinions to meet up for a discussion.
Here's a nice example - I see in the Daily Mail today this article:
Which is a story how the grandfather of the guy that went nuts on the gay bar is a MAGA guy.
So the author apparently intends to stain that movement with the rampage.
Should this be censored because of its prima facie stupidity, or should I have the opportunity to easily refute the headline by saying "They had to go back to the grandparent? So I guess his parents are Biden supporters."