I’m guessing that one of his reasons for posting the article was to wake up some of the complacent mormons who go along thinking that their church is unique and correct. It may stir them to thought and get them to searching...hopefully to discover the actual truth.
I didn't read the removed post...I'm guessing at "responding."
Simply put, #1: I didn't write this article (Brother Andrew did; you can ask him)
#2...Reaganaut sized up a nice response.
#3...I would simply add this comment: One aspect is to show that Mormons have more in common with Islam (& therefore, Islam's founder, Muhammad) -- than they do Christianity -- due to its founder, Joseph Smith.