what i think is that you are being somewhat disingenuous. as well as perhaps being a bit of naive with regard to certain aspects.
you say that it is thought that one German guy brought the virus to Italy. while that could be true, discounting the possibility that a Chinese nationalist brought it from a place where it is believed to have originated and many of those Chinese nationalists are from the suspected origin is not being totally honest.
yes, i have no idea whether or not the tweet and hence the article is true but it is not just some willy nilly tweet, the guy in question is a 'blue check mark' and based a portion of his article on a Reuters article. as i say though, i really don't know and am just trying to look for truth.