Those American warplanes, particularly the F-14s, most likely aren't airworthy anymore. And they were sold to Iran during the Shah's era.
And they certainly don't have any decent munitions that can compete with current American technology. Even stuff from Russia. If it comes to an air campaign, they will be just as vulnerable as Iraq was- maybe more so.
The point is, many developed countries sell arms of all sorts to all sorts of shady countries/entities and we're right there in the thick of that business.