Just wanted to ask, what is the evidence from original Islamic sources that concludes insulting a companion of the Prophet means apostasy?
And exactly why do you think that "almost all of the scholars who benefit this ummah ... [are] from Saudi Arabia"? A person who lives in a particular region is more likely to know the scholars of that region. I, personally, at the moment cannot think of even a single Saudi scholar's name, partly because they have difficult names to remember, but many notable names who come from my part of the world. Additionally, most of the really famous Islamic personalities that I have come to know of, such as Ahmad Deedat, Dr. Zakir Naik, Nauman Ali Khan, Abdullah Green, Dr. Shabir Ally, Yasir Qadhi, none of them hail from Saudi Arabia.