Peace,
"Only the Muslims in Hell are granted any intercession."
That's ignorance, if you read this topic, did you not see the part about the people who have never "heard of Islam" before?
Think your mixing religions up where in one all go straight to Heaven on a single statement and the rest don't. The answer to this direct question isn't as straightforward, there are Scholars with different opinions on the matter. Anyways, God knows his Creation better then Man does. This is a good article -
Do non-Muslims go straight to hell?
Most people think (rightly or wrongly) that Islam is an exclusive religion. The thinking goes: You either believe in it or you don't. Anyone who doesn't, will suffer punishment. That punishment will most likely be the Hellfire.
Or the thinking goes: Hold on, what about all the really good people who were (or are) non-Muslim. Mother Teresa, Mahathma Gandhi, and so on, did countless good things for humanity. Will all their good deeds go to waste just because they weren't Muslims?
But what is the answer? Does Islam say that all non-Muslims will go to hell?
This post is not to say that the answer is "Yes, they're all gonna be punished" or "No, God is Love, the good people will be ok". This post is merely to give food for thought, and, if it makes any conclusion at all, will be to say "Don't know for sure, but not necessarily".
People cite different verses from the Qur'an to present their particular view point.
Let's take a look at a few (please note that for in-depth Quranic exegesis please refer to qualified Quranic scholars):
"Surely those who believe, and those who are Jews, and the Christians, and the Sabians, whoever believes in Allah and the Last day and does good, they shall have their reward from their Lord, and there is no fear for them, nor shall they grieve."
(Holy Qur'an 2:62 and (almost identical in) 5:69)
This seems to indicate that salvation is dependent upon three conditions only: Belief in God, Belief in the Day of Judgement, and righteous or good deeds.
What about Mother Teresa and her ilk of righteous non-Muslims?
"Then shall anyone who has done an atom's weight of good, see it!
And anyone who has done an atom's weight of evil, shall see it."
(Holy Qur'an 99:7-8)
This verse suggests "anyone" or everyone will be rewarded for their good and bad actions. But will they go to Heaven or Hell? Allah hu Alim.
Another argument put forward is that, only those who have received a full and complete understanding of Islam will be judged by their acceptance(Muslim) or rejection (kufr) of it. If they haven't received this complete understanding of Islam then they will be tested on Judgement Day, and dealt with accordingly.
And as a final note, something useful from
Mr. Lamaan Ball, editor of Ask About Islam:
When we refer to "Islam" there are at least two specific distinct meanings implied. Firstly there is the essential Islam as the religion of all the prophets from Adam, Noah, Abraham, Moses, Jesus and until Muhammad. Secondly there is the meaning specific to the revelation given to Muhammad and all the religious instructions contained therein. We might call this the completed Islam. Essential Islam encompasses the broad principles of pure monotheism free from shirk(associating partners with God), and our moral accountability before God. The completed Islam is the full set of guidance provided through the Qur'an and the sunnah of Muhammad which abrogates the earlier rules given through previous prophets.
Both 5:69 and 3:85 refer to the essential Islam and not the completed Islam we often mean in our conversations. Once this point is understood, the apparent problem disappears.
Second, the mere historical existence of Muhammad (pbuh) does not mean that the completed Islam has reached everyone. Once the completed Islam reaches any group of people, - by which I mean that the message is adequately delivered – then they can no longer claim to be doing good if they are knowingly rejecting God's guidance in the Qur'an. Before that situation is reached, for any individual, it is quite possible that they are Muslims in the sense of following essential Islam. Just as the earliest followers of earlier prophets were.
Source -
http://jamrullistan.blogspot.com/2005/05/do-non-muslims-go-straight-to-hell.html
But yeah, not looking good for those who have heard of Islam/Muhammad(pbuh) and still affiliate partners with the Creator.