Ask Israelis. They received Scuds in 1991.
If Scud is no WMD, please let me know what really is.
Actually, no a SCUD does not qualify as a WMD. It is a missile of particularly poor quality. If you put a nuke or gas or biological warhead on it, then yes it certainly can deliver a WMD short range but on its own, a SCUD is not a WMD.