There is no conclusion. To iterate what Hazir Imam Mowlana Shah Karim Agha Khan* once said, the Muslim world is very diverse and divided. The image of the Muslim world as a monolithic entity is false.
Not only is there a diversity in cultures, languages, and races, but also a great variety in fiqh, practice, and beliefs. Thus, one cannot say, “Thus and thus it is.”
Example: what is the shahadah (declaration of belief) of Islam? According to many, it’s “La ilaha il Allahu, Muhammadur rasul Allahi” (“There is no god but God, and Muhammad is God’s messenger”). Shi’as say it’s “La ilaha il Allahu, Muhammadur rasul Allahi, Alyun amirul mu’minin” (the last part meaning, “Ali is the commander of the faithful”). Then there are those who say it’s only, “La ilaha il Allahu.”
And now for something different.
“SA” stands for “salallahu alaihi wassallam,” which means, basically, “may the peace and blessings of God be upon him.” This is only used after saying Muhammad (SA)'s name. The English for this is “PBUH” or “peace be upon him.” Many Shi’as will write “PBUH&HF,” meaning, “peace be upon him and his family.”
Two other oft-used abbreviations are:
“AS” - “alaihi salam,” “may peace be upon him.” This is said after stating the name of revered deceased figure, such as one of the rightly guided caliphs (if one is Sunni), an imam, etc.
“RA” - “razi Allah (ta’la) anhu/anha,” “may (Almighty) God be pleased with him/her.” Said after stating the name of someone good and pious but not “high” enough on the spiritual ladder, so to speak, to merit a “AS.”
*Hazir Imam - present or current Imam. Imam here meant to signify the solitary leader of the Muslims and all the world’s peoples, upon whom rests the light and grace of God. There is a belief among some Shi’as that if one dies without knowing and/or acknowledging the current Imam of the time-period, he/she cannot enter Heaven. Now, who is the current Imam? Could be one of many people. For many Shi’as, it’s Imam Mahdi, who is in occultation (seclusion, hiding). For other Shi’as, it could be their person claiming to be the Imam.
Mowlana - honorific title, meaning “our master”
His Highness Shah Karim Agha Khan IV - fourth Agha Khan (title bestowed by the Shah of Iran, style bestowed by the British monarchy) and forty-ninth Imam of the Shi’a Imami Ismaili Muslims. For the Ismailis, the current Imam is Hazir Imam Mowlana Shah Karim.

WRS