Do you know how Islam entered Qatar? Please read this!
Qatar used to be a Christian Kingdom before Islam, until Prophet Muhammed peace be upon him sent the following letter in year 7 Hijrah (image has copy of original) to the ruler of Qatar, King Almunthir ibn Sawi (which was part of the Kingdom of Bahrain, including Kuwait, Oman, UAE and Eastern Saudi):
"In the name of Allah the most merciful. From Muhammed the messenger of Allah to Almunthir ibn Sawi, Salamu Alaik. I am praising Allah the only God and I bear witness that there is no true God except Allah and that Muhammed is his slave and messenger. I (prophet Muhammed) remind you of Allah, that whomever follows an advice he is following it for himself, and whomever follows my messengers and obeys them he has obeyed me. My messengers have praised you with good, and I am interceding you about your people, so leave the Muslims on what they believe. And as long as you do good, we will not remove you from your position. Whomever chooses to follow Judaism or Magianism, he should pay the Jizyah." (Ibn Katheer 6/327)
King Almunthir accepted Islam, and the majority of his people. Although he never met the Prophet peace be upon him, he narrated hadeeth from his letters, and he died in the same month as the Prophet of Allah died, may Allah have mercy on him. The messenger who delivered the letter, the companion Al-Alaa ibn Alhadrami, became the next ruler, as if Allah is rewarding him for carrying the message that caused nearly an entire nation to accept Islam!
Subhanallah, when reading the original script of the letter of the prophet peace be upon him, my eyes were filled with tears of how much mercy there was in the letter. Wallah we could sit for a whole lecture just to analyze every sentence in the letter! Notice how he praised him and did not force him to accept Islam, and assured him that he will not remove him from power regardless of his choice as long as he is doing good to his people, and so many other things!
For those who would like to read the original Arabic, here it is:
بسم الله الرحمن الرحيم. من محمد رسول الله إلى المنذر بن ساوى سلام عليك، فإني أحمد إليك الله الذي لا إله إلا هو وأشهد أن لا إله إلا الله وأن محمدًا عبده ورسوله، أما بعد: فإني أذكرك الله فإنه من ينصح فإنما ينصح لنفسه، وإنه من يطع رسلي ويتبع أمرهم فقد أطاعني، ومن نصح لهم فقد نصح لي، وإن رسلي قد أثنوا عليك خيرًا، وإني قد شفعتك في قومك فاترك للمسلمين ما أسلموا عليه، وعفوت على أهل الذنوب فاقبل منهم، وإنك مهما تصلح فلن نعزلك عن عملك، ومن أقام على يهودية أو مجوسية فعليه الجزية