For there to be so many belief systems that proclaim themselves the ‘One, True Faith’ literally does not add up–which leads us to the only logical conclusion possible: since all the faiths that proclaim themselves to be so, cannot possibly all be the ‘One, True Faith’, then none are – but all contain elements of truth, albeit colored and influenced by the prevalent and accepted practices, cultures, and prejudices of their times.
You can’t reasonably and realistically study the evolution of any religion without putting each within its proper sociological and cultural context. If we were to accept Islam’s premise that the Q’uran is the eternal, literal and complete word of Allah (God), even if it existed outside of time, its revelation occurred covering specific points in time.
The problem with the Hadiths (practices of the Prophet Muhammad) is that they occurred in the context of the 7th century, and as such, Shariah (Q’uranic Law) is frozen in anachronistic 7th-century thought, which clearly does not translate well to a 21st-century context. Also, the belief that Muhammad was a perfect man who could do no wrong suffers from circular reasoning. He is perfect because he is the Prophet of Islam, he was chosen as the Prophet of Islam by Allah because he was perfect. Was Abraham perfect? No–but he was man of God. Jesus, through immaculate conception, was able to be sacrificed as penance for all of man’s sins: past, present, and future. Muhammad, on the other hand, was a serf to God, and a vicious warlord. That vicious intolerance is perpetuated today by Muslim fundamentalists. Islam’s “Peace” only exists when Islam rules the entire world.
Judaism teaches adherence to the law of God. It seeks no converts, and actually discourages them.
Christianity teaches salvation through Christ, and peace through humility. Christianity welcomes those who chose to accept Christ as their personal messiah.
Islam teaches that God is vengeful and unforgiving, and all must be converted to Islam, even by force, if necessary.
All religions have nugget of truth in them. But of the three Abrahamic religions, only Islam seeks to subjugate and eliminate the other two, as being based on false and corrupted revelations.