Indonesia: How did the largest Muslim country become Muslim?

No - just everything that is or was Iranian.

Iranians just like to claim everything as the world has never seen Muslims except the Persians.

Indonesia was not Muslim because of Persian  & Mangolian trade. That trade was minimum and Persians never were interested in spreading Islam. Have you ever heard of Persian Islamic conquest?

1055= all sunnite muslim world except Umayyad govern of Andulucia was under Turkish command.

Only independent muslim realm was Shiite Fatimids of Egypt.

Well, im not sure about indonesians of arab ancestery in saudi arabia. Usually the immigration to Indonesia was for Yemenis mainly as the situation worsened in Eden with the opening of Suez Canal. However, the Indonesians in my region Hijaz (all muslims immigrating to Saudi Arabia in old days will choose Mecca or Medina) are of pure Malay ancestors.

That immigration of Malay people to Hijaz was so great in in mid 1800's that the Dutch opened a counselate in Jeddah. I grew up between two major cities, Jeddah and Mecca and a lot of my friends you can tell the are originally Malay by their features and names, such as Khuja, Al Jawi, Tambosi...etc

Their contribution is not only that most of them were educated and affluent business traders who reside the holy cities, but soccer was brought to Saudi Arabia as early as 1927 through Indonesian community who probably learned from the Dutch. They also brought with them delicious menus. Gado gado yum! 

Well, it is so hard to distinguish between who accepted Islam through
Trade, science & education, or military might of nearby kingdoms. I won't
say that there are nations who had Islam being forced on them after the
conquest, because there is no imperical evidance of that
whatsoever if it wasn't the opposite, but Im sure that Malay, Turks, sub-
saharan Africa are examples of adopting Islam through personal
interaction of civilians rather than kingdoms and empires.

Drawing on this specific topic, I was delighted to find a more detailed
description of the nature and process of that personal interaction with
Muslim traders and merchants. An interview with Hamid Algabri
(born near Surabaya, East Java in 1912), lawyer, one of the leaders of
Indonesia's revolutionary movement, former member of Parliament, and a
prominent senior member of the Arab community in Indonesia, spoke to
Cynthia Myntti (CM) in Jakarta in March and April 1993.
http://www.aiys.org/webdate/gadr.html

He basically descriped the history of trade with Indonesian islands. Most
interesting of that article, that he confirms the point, Zagros mentioned
it, that trade with that region is as old as before Islam. However, with
Abbasid empire, that trade became an important cycle of spice trades
which increased the interaction with the locals.
Also, another interesting fact, that though Arab traders immigrated there
to settle in Indonesia, those wave of immigrants were mainly males! They
settled there and married Indonesian, and chinese wives and you cannot
distinguish them from Indonesians except with their surnames.

Rajasa, they say Kingdoms on the shore of Indonesian islands were
formed by immigrant Muslims merchants. Is this true? and did they clash
with local kingdoms?

No, mot really more than the fact that they exist, but i've asked an Indonesian friend, i'm waitin for his reply.

Zagros, Indonesians are not alone. Turks also embraced Islam as an independent country without any foreign force.

Bernard Lewis mentions that in Karakhanid Khanate, 200.000 Tents embraced Islam on one night.

Check the facts again.

Alot Muslim Traders from Arab,India, and China introducing Islam to us, and thats true some Persian also,even according to our historian my City where I born, Cirebon opened first time by Persian name Sheh datul kafi,

But we should give a cridit to Wali Sanga ( Nine messenger ) who spreading Islam in Java