But my thoughts had lead me to that fact that Prophet Muhammad is the author to Al-Quran.
And now you claim that the quran is contradictory. God created the Quran and it says that he did create it in the Quran. why would I accept that conjecture that offers heaps of contradictoins. The Quran is amazing in that it is completely perfect, even down to the scientific expressions. 1788 = "Say "If the whole of mankind and Jinns were to gather together to produce the like of this Qur'an, they could not produce the like thereof, even if they backed up each other with help and support."
Fighting can be good. Shades of grey. Weaponry can be used to hurt the innocent or protect them. The lesser Jihad should also be of importance to us. The Quran never ever condones invasions or attacking the innocent. But our creator clearly tells us that defending ones self is a rightous cause. We all hate war. but if some one comes and tries to kick my ass... im not going to stand there.
P.S. Let us not forget that through out the quran it is constantly promoting mercy and peace. Even every surah begins with glorifying gods mercy. It condones befriending the disbelievers as long as they dont attack. It even uses the expression "birr" Which is normally used as love between kinship. It clearly states to be fair and loving. To be merciful. To never transgress limits. Lets not go up in arms as soon as we see something involving conflict. After all danger lies all around us.