If they did it...
If they did it, then it would not be permissible for the ulema of the Shia and their religious authorities to consider the azan and iqamah as null when this statement is mentioned as an actual part of them (the azan and the iqamah ) as we have said before. Fairness and justice require us to say the word of the truth and not to deny the Sunni for something while we ourselves do the like. Allah says: What!
do you enjoin men to be good and neglect your own souls while you read the Book; have you then no sense? Qur'an, 2:44 Once, one of the Shia said to me, “O my brother, do not mix between “prayer is better than sleep” and “I bear witness that Ali is the saint of Allah”! I said, “Why?
Prayer is really better than sleep, and Ali is really the saint of Allah, but they are parts added later on and the Messenger of Allah (S) did not do that.” He said, “But the guardianship of Imam Ali (a.s.) has been revealed in the Qur'an, and you yourself have acknowledged that in your book ‘Then I was Guided’.” I said, “So, the Messenger of Allah (S) was to be blamed, for he did not make that in the azan !!!” Not everything that has been revealed in the Qur'an is to be added to the azan or iqamah and my acknowledgment that it has been revealed in the Qur'an does not make it necessary to be added to the azan or iqamah .
Is it right for one to recite for example, in the azan, “I bear witness that there is no God but Allah, bear witness that Adam is the choice of Allah, bear witness that Noah is the prophet of Allah, bear witness that Abraham is the friend of Allah, bear witness that Moses is the spoken to by Allah, bear witness that Jesus is the Holy Spirit of Allah, and I bear witness that Muhammad is the beloved one of Allah”? All these facts are true and they have come in the Qur'an.
However, we cannot recite that in the azan , because the Messenger of Allah (S) has taught us to recite in the azan only the two witnesses “I bear witness that there is no god but Allah, and I bear witness that Muhammad is the Messenger of Allah (S)”. We must abide by the saying of Allah: …and, whatever the Messenger gives you, accept it and from whatever he forbids you, keep back .
Qur'an, 59:7 It is true that some of the Shia ulema do not mention “I bear witness that Ali is the saint of Allah” in the azan or the iqamah . I offered prayers with some of them and did not hear them say so. That they might mention it in their hearts, is something else.