Actually, This Could Be ...

 ... the case of ...

... mistaken identity by Patriot PAC3 aka MLRS Renegade. 

Representative of the IRGC: "The destruction of the passenger terminal of Kuwait Airport occurred due to a mistake of the American Patriot systems." "Our investigation and analysis of the incident with the destruction of the passenger terminal of Kuwait show that the Aerospace Forces of the IRGC did not carry out any strikes on this target. The destruction of the passenger terminal of Kuwait Airport was the result of a mistake of the American Patriot systems, which, after an unsuccessful attempt to intercept Iranian missiles, hit this terminal."

Very well could be, because PAC3 is known for inability to maintain lock on target. The cases of PAC3 AD missiles hitting own (or friendly) forces and residential areas are very numerous and well-documented. As most US weapon systems it looks good in booklets from military exhibitions, while being laughed at by people who got acquainted with S-400.