It isn't problematic, just silly. There is no need to police other people's thoughts as long as they keep within the bounds of the law. He is even free to express those thoughts, within the bounds of the law, just like people are free to hollder 'death to America' during demonstrations in Oakland. One of the pillars of a well-functioning state is that things which are not forbidden by law are allowed. It might not be wise, it might not be smart, it might sound stupid (Qanon) or reprehensible (death to America) but it is allowed.
I'm confused, you started the argument off by claiming that spreading PizzaGate isn't problematic and then went into a series of arguments for why it should be legal? Can legal things not be problematic?
I'm confused by your confusion given the fact that I clearly stated that whatever someone says has to be within the bounds of the law. As far as I can see there is no room for confusion here, freedom of expression is bounded by certain laws which forbid a number of things. As long as you don't violate those laws you can say whatever you want.
