Wait wait wait.. are you trying to convince us that an independent iran was ever a part of the "Ummah"?
When Islam first revealed, iran was independent as the sassanian empire. iranians then refused the Prophet's message, and their shah ordered for the Prophet to be brought to him and to submit. Then the war happened and iran was conquered to be one of the many districts of the larger Islamic Arabian empire (Umayyads).
Fast forward to when iran gained independence again.. The safavvid empire, again, stabbing the Ummah, the Islamic Turkish empire at that time (Ottomans), in the back, and consistently starting wars on the eastern front when the Ottomans were trying to fend off the European crusader forces on their western front. Many histroians even say that if not for the iranian savaffids, Europe would have become completely Islamic. The safavvids even allied with the Portuguese against the Ottomans among many other conspiracies and plots against the Ummah.
Fast forward again to modern iran, and I qoute:
"Israel viewed Iran as a natural ally as a non-Arab power on the edge of the Arab world, in accordance with David Ben Gurion's concept of an alliance of the periphery. Israel had a permanent delegation in Tehran which served as a de facto embassy, before Ambassadors were exchanged in the late 1970s.[16][17]
After the Six-Day War, Iran supplied Israel with a significant portion of its oil needs and Iranian oil was shipped to European markets via the joint Israeli-Iranian Eilat-Ashkelon pipeline.[18][19] Brisk trade between the countries continued until 1979,[20] with Israeli construction firms and engineers active in Iran. El Al, the Israeli national airline, operated direct flights between Tel Aviv and Tehran.[21] Iranian-Israeli military links and projects were kept secret, but they are believed to have been wide-ranging,[22] for example the joint military project Project Flower (1977–79), an Iranian-Israeli attempt to develop a new missile.[23][24]"
Even after the so called "Islamic" revolution, iran started wars with other Muslim countries, and their escapades with Israel never stopped, even at that time. Like the Iran-Contra affair:
"The plan was for Israel to ship weapons to Iran, for the United States to resupply Israel, and for Israel to pay the United States"
These are but snippets of the long history of the relation between an Independent iran and the Muslim Ummah. These are clear like the sun, these are not rumors not backed by real evidence and is not a propaganda.
The only instances where persians were ever a real part of the Ummah was when they were ruled over by Muslims of a different ethnicity, like Arabs.
The iranians, even the "religious" ones today sleep with their dear persian shahnamah at their side. Not the Arabic Qur'an, not the Arabic Prophet's Hadiths, and not even their so-called dear 12 Arab Imams sayings and teachings.
The irony and revealing truth is that, ayatollats, claim control and supremacy over iranian people now using the claim of being of Arab lineage, yet in the ayatollats dominion and presence, Arabs, as people, are consistently insulted in poetry and speeches. And books that badly portray Arabs, are highly revealed and widely distributed.
They use this Islamic ummah cover just to connect with their surrounding environment, as them being
ONLY persians would never fly and would never allow them to convince a soul outside of their lands to accept them as real brothers or allies. Without that cover, they would be like Israel and the jews, and iran pre-1979, they would be disconnected, different language, different mentality, and a different religion. They would scramble trying to find anyone to have a real and meaningful connection with.
Again and again and again.