The entire news article appears like typical american hitjob. There is no evidence whatsoever that Iranian state is linked to this man, heck no evidence about Hezbullah either.
At any rate none of this is different from what Saudi citizens have been doing for years in Europe and USA.
It was a Lebanese group. In that sense America is linked to every tyrant in Middle East, ISIS etc. America has always been the agressor in Iran relationship.
https://twitter.com/benrileysmith/status/1137831840188948485