The IRGC would hit Mecca before hitting Rome. The Sunnis are the larger threat.
The destruction of Rome by Iran comes after the destruction of Israel and the US. Its not threats that motivate Iran, but religious concerns. Everyone keeps missing this point. It why Iran is hitting civilian targets - more available blood to draw the 12th Imam out of the Well he climbed into in 820AD.
The Mad Mullahs and the IRGC are religions fanatics! The Shia 12er sect wants to start a nuclear war in which they do not care if they die in the process, as long as enough blood is spilled to bring back the 12th Imam, whose goal is to extinguish the entire human race by bringing everyone to Paradise.
To that end, a Fox News host, in an off-the-cuff remark, mentioned that
one of Iran's negotiators told Witkoff that they now had enough enriched materiel for 11 nuclear bombs. No further comment was made on that point.
In around 2 weeks, they would had been launching them from personnel and drone manufacturing bunkers so hardened that nothing the US has could have penetrated. The Mad Mullahs and the IRGC are religions fanatics! They are not the ordinary Sunni variety.
Speculation: The wealth they are shipping out of the country is likely designated to be used by surviving 12ers to restart their religious movement, not for their personal wealth, as they are all hoping to die as martyrs and go straight to Paradise.