My dear brother Sidqi, I am almost afraid to answer your question as I have this perception, based on some of your posts, of you being a very intellectual and brainy Tyrannosaurus Rex!
This is a huge topic and probably all of your reasons are valid for the uncivilised reaction of a small minority of Muslims. Most people are just content to get on with their lives but a few have a ‘tribal mentality’ that makes them react in the way we see. This can be seen with violent attacks between rival football fans in England in the 1960’s, 70’s and 80’s, and there is still abuse shouted between them now; caveman grunting! No-one, no religion, no society is immune from this disease, as is also evidenced by fighting between Christian monks in Bethlehem (Dec 27 2007) and more recently. CND protests, activists against global warming, anarchy at every G8(G6?) conference, all are signs of aggressive behaviour from non- Muslims, they have their black sheep as well (I agree with some of the motivating factors behind each protesting group, but not the actions they sometimes resort to).
Muslims are continually being reminded of their glorious past and blame everyone else for the losses that have occurred over the past 600 years or so. Instead of going back to the Quran, seeing how the Companions of the Messenger were able to correctly implement this Book, show the world how they were the best of peoples by example [to coin a recent phrase, “to walk the talk”], engaging with ‘the enemy’ in civilised dialogue with the intention of establishing peace and freedom (a carrot before using a stick), some have resorted to looking at obscure hadith that talk about violent conflict, death to infidels, death to those who they perceive as insulting the Messenger etc. They want to impose sharia laws on the world but forget that they would be without the freedoms they are abusing now; anyone for a Green card?
There are grievances on the Muslim side, Palestine, Kashmir, Chechnya, Iraq, Afghanistan, etc but the way to overcome these problems is to use the “way of Allah”, that is Jihad Fi Sabeel-i-Allah, to use or exert one's utmost power, efforts, endeavours or ability, in obedience of Allah, in contending with tyranny, injustice, wrongdoings, transgression, and evil. Sabeel-i-Allah in the Quran is the opposite to sabeel-i-Taghoot (striving in the cause of evil).
61:11 That you put your faith in God and His Messenger and strive in the Cause of God with your wealth and person. This is for your own good, if you but knew. [9:111]
25:52 Hence, (O Prophet) disregard the likes and dislikes of the rejecters, but strive hard against them by means of this, with utmost striving. [Jihadan Kabeera = The Great Jihad by means of this Qur’an]
And we must deal justly with all people, including our enemies:-
Surah 5 verses 7-10
5:7 Remember God's Blessing (Guidance) upon you and His Covenant binding upon you when you said, “We hear and we obey.” Be mindful of God. God is fully Aware of what is in the hearts. [1:4-5]
5:8 O You who have chosen to be graced with belief! Be upholders of justice for the sake of God as witnesses to the Truth. Let not the hatred of any people move you away from justice. Deal justly. That is closer to being upright. Be mindful of your duty to God. Surely, God is fully Aware of what you do.
5:9 God promises the protection of forgiveness and a Great reward to those who attain belief and do works that fulfil the needs of people and increase the well being of society.
5:10 On the other hand, there are those who reject Our revelations openly, or deny them in action. They are the companions of the Insurmountable Barrier. [‘Selves’ that fail to develop, are unfit to move up to the higher levels of existence, so they merely survive instead of achieving true immortality. 69:27]
And why did we lose? One answer is that we took our enemies as friends; we made their beliefs part of our own; their false ways became ours; we enjoyed their way of living; we married their women but failed to convert them to Islam and then they made us deniers of the truth, kafirs:-
60:1 O You who have chosen to be graced with belief! Do not take My enemies – who are your enemies as well – for friends. Do you extend love and friendship to them when they reject the Truth that has come to you, driving out the Messenger and you because you believe in God, your Lord? If you are committed to strive in My way and to seek My approval, befriend them not. Do you show them friendship in secret, when I am best Aware of what you conceal and what you reveal? And whoever among you does that, he has certainly strayed from the right way. [3:117]
60:2 If they ever overcome you, they will divide you, and smite you with their hands and tongues causing much disruption. For, they will love to see you reject the Truth. [‘Idia = Wedge = Wedge of division = Enmity = Dissension = Distance. Su = Disruption = Imbalance = Evil = Inequity]
60:3 (Divine Ideology comes first. Know that) Your family, relatives and your children will not avail you on the Resurrection Day. He will decide between you on individual merit alone. And God is Seer of all that you do.
Their answer is to grow a beard, wear shortened trousers, put a hat or Hijab on your head, pray more, fast every other day, carry rosary beads, go to the Yemen to learn Arabic(!), do not smile, stop women from being educated, marry them young and swap them when they are past their used by date. Anything else I have forgotten to put our lives back on the straight path?