The Bible Confirms: Muslims are the Brothers and Sisters (and Mothers) of Jesus by Yahya Snow
This may come as a surprise to those who are unaware of the contents of the Bible as well as unaware of whom the Muslims are but rest assured it comes as no surprise to those who are familiar with Prophetic Monotheism.
In order to explain the title let us look into the statement attributed to Jesus within the Gospel of Mark (3:35). Herein Jesus teaches us that his brothers, sisters and mothers are those who follow the Will of God.
Mark 3:35 says “For whoever does the will of God, he is my brother and sister and mother.”
The uninformed may ask; how does this relate to the Muslims? Well, the word ”Muslim” simply means one who has submitted to the Will of God, so we come to know that “whoever does the Will of God” is a Muslim.
Thus we realise that Jesus is referring to Muslims in this passage so we should pass on these glad tidings to the Muslims as Muslims are indeed the brothers, sisters and mothers of Jesus. We also realise from hadith literature that all Prophets are brothers , so essentially Jesus is confirming that he is the brother of all the other Prophets too as all Prophets do the Will of God, i.e. all Prophets are Muslims.
We should also acknowledge that this verse is from the Gospel of Mark, this Gospel is thought to be the most reliable of the four as it is the earliest but it is also clear that even this Gospel has been adulterated (or changed) by the scribes; this is seen through the footnotes in the NIV Bible (indicating manuscript differences) especially the last ten verses of the Gospel of Mark (16:9-19) which are forged additions by a scribe(s).
Nevertheless the statement attributed to Jesus in Mark 3:35 does have the ring of authenticity to it as it chimes well (agrees) with what another Prophet taught; Prophet Muhammed taught something similar , this also hints to us that this was a general Prophetic teaching.
Of course, it should also be said that the sincere companions and followers of Jesus are Muslims too. And all Prophets are Muslims. So indeed all those who have submitted to the Will of God are Muslims and are brothers and sisters. One big happy family!
As a side note, this verse from the Gospel of Mark does reinforce the view that the followers of Jesus thought of Jesus as a Prophet rather than God as God would not declare people to be his mothers, sisters or brothers. It also shows that Jesus did not view himself to be God as this is not a statement one would expect of God but one would have expected a statement like this from a Prophet, hence Jesus thought himself as a Prophet.
Note: All Biblical quotes are taken from the New International Version of the Bible
 Sahih Bukhari Volume 4, Book 55, Number 652
 Ramûzu’l-Ehadis p. 361, 4460
Taken from: http://thefactsaboutislam.blogspot.com/2009/12/jesus-has-muslim-brothers-sisters-and.html