Mr. SAM, we have no problem when Muslims preach their peacefully. Muslims are preaching their religion in India, the USA and Europe. They are succeeding in converting many people to accept Islam. Have you known about any case where a person leaves Christianity and converts to Islam being killed?
In India, famous author Kamala Das converted to Islam. She was not killed. Her books are still being sold in stores in India. Her family did not reject her. On the contrary, her Hindu family attended her funeral. Sharmila Tagore, a famous movie star, converted to Islam. She is happily living in India. Her Muslim sons are very prominent actors in India.
Cassius Clay who became Muhammad Ali in the USA, was not killed. Americans still love him as a great boxer. He was invited to the White House many a times.
Compare the above with what happens in Muslim countries:–
-There is no freedom of religion.
-Non-Muslims are not allowed to build their temples, churches etc.
-Non-Muslims are not allowed to preach.
- There is death penalty in Saudi Arabia, Iran, Sudan, Afghanistan and many Muslim countries if Muslim converts to other religion.
-Muslims are extremely violent. They react very violently to even very trivial matters such as cartoons. But they feel free to insult other religions.
Prophet Muhammad said there will be 73 groups (sects) in my Ummah according to hadith's given below,
Narrated by Abu Dawood “The Jews were divided into seventy-one or seventy-two sects, and the Christians were divided into seventy-one or seventy-two sects, and my Ummah will be divided into seventy-three sects.” Or "The Jews were divided into seventy-one sects, one of which is in Paradise and seventy are in the Fire. The Christians were divided into seventy-two sects, seventy-one of which are in the Fire and one is in Paradise. By the One in Whose hand is the soul of Muhammad, my Ummah will be divided into seventy-three sects, one of which will be in Paradise and seventy-two will be in the Fire." It was said, O Messenger of Allaah, who are they? He said, "Al-Jamaa’ah."
References from Quran about sects
"Verily those who split up their religion and became sects, you have absolutely nothing to do with them." [Holy Qur'an 6:159]
[30:32] (Do not fall in idol worship,) like those who divide their religion into sects; each party rejoicing with what they have.
[42:14] Ironically, they broke up into sects only after the knowledge had come to them, due to jealousy and resentment among themselves. If it were not for a predetermined decision from your Lord to respite them for a definite interim, they would have been judged immediately. Indeed, the later generations who inherited the scripture are full of doubts.
HOPE THIS MY SMALL EFFORT GIVE YOU SOME KNOWLEDGE.