Khwarizmi being Persian: Original research, which has nothing to do with Wikipedia 

Let's look into the Persians' claims, shall we?

Zmmz lists Merriam-Webster with this quote: "Function: biographical name circa 780-circa 850 Muhammad ibn MusA al-KhwArizmI Islamic (Persian-born) mathematician & astronomer; one of the greatest scientific minds of Islam; source of much of mathematical knowledge of medieval Europe".

 Notice, it says "Persian-born" in parantheses, and gives Islamic as the nationality. Basically, they defined him by religion and stated his place of birth. He was born in Khwarizm, in the Khorasan province. At the time of his birth, it was part of the Arab Islamic Caliphate, now it's part of the Uzbegistan nation-state. Alas, Persians burnt us saying that it's in fact Persian, so let's take it as Persian. Now, according to sources cited by Heja Helwada, Khorasan in general had a huge Arab population. In accordance to that, defining him as Persian simply because he was born in Khorasan, is not only disputed at best, it also constitutes OR(original research) which is against Wiki's policy, see: WP:NOR

A troll showed up lately and claimed that Arabs are fighting a losing battle, I'm not sure we're in a battle-field here, but I got the gist: he thinks we have no sources...poor little guy!

Sources that state he's explicitly an Arab:

http://www.bartleby.com/65/al/AlKhowar.html

http://uk.encarta.msn.com/text_761560322___0/Khwarizmi_al-.html

http://www.britannica.com/ebi/article-9311992

Who's losing the "battle" now, I wonder?