These are valid questions. You are also asking them correctly, which is important, that I can concede to you, even if I disagree with what to conclude or what to add.
Your arguments are valid for the most part...but islamic history is replete with violence and war, I am no scholar of history. But there is something seriously seriously wrong.
Indian muslims who will be the world's largest muslim population in the world shortly are supposedly the most peaceful group in the world. .but then..there come wahaabist preachers in their thousands trying to turn them into maniacal fanatics, ISI inciting them to turn into traitors, Internet filled with propaganda from isis which will turn a few eventually.
When you say that muslims want isis dead....then why is there no muslim army or muslim airforce attacking them and taking care of the issue?..I hear pakistan refused to join an anti isis coalition..If isis really troubles muslims so much then why did pakistan turn is back?.
A few internet or media condemnation does not cut...If you consider Hindu extreme right wing rising in India as a issue....who do you see opposing it?...It's Hindus..even at the cost of alienating their audience or putting up with lot of criticism. They might be wrong or they might be right..that's for us to sort out.
Similarly If you see Christian right wing expanding..its the christians who stand up against it.
First of all, I am not here to argue that the Muslim world is not infested with terrorism that is a result of a prior infestation of extremism and sectarianism, note the latter, sectarianism is very often, and very wrongly overlooked by many so called 'analysts' when it comes to these issues. It is hugely important. Nowhere (hardly anywhere) in the Muslim world is any militancy, or terrorism complete without a sectarian element.
I am also not here to deny that the end responsibility of the task of dealing with these monstrous creatures lies with Muslims. In fact, I believe now, and have been proven right in seeing that no foreign intervention can kill these parasitic militancies, they often make the situation worse in their intervention, it is ultimately the task of Muslims to do it themselves.
But...
It is Muslims who are doing most to combat extremism. Granted, certain GCC countries are complacent, and other support extremism. The same countries in turn are propped up solely because their power is profitable to many world powers. However, it is Muslim Kurds, Muslim Syrians, Muslim Iraqis, Muslim Pakistanis, Muslim Afghans, Muslim people who are fighting the militancies at home. We are most involved, and we suffer the heaviest tolls.
The whole calls for Muslims to 'do more' is seriously out of place.
Also, Muslims in the west face a weird situation, where they look on in horror at the terrorist incidents just as other Europeans would, and then at the end of it, misunderstood fools speak out against all Muslims as a whole, and they often use the counter of; "Moderate Muslims need to 'do more'... or speak up more". They do this, while simultaneously claiming that there are no moderates, and then the irony just gets more elaborate... when we do speak up, often we're accused of lying, being outliers, or in the case of your quote; 'A few internet or media condemnation does not cut...'.
Well, what do you expect, people call for us to be vocal, which is not right or necessary, and then when we do, it isn't enough. What more should my Muslim doctor, my Muslim teacher, bus driver, retired old man, or school-kid meant to do about it? It's a weird and unresolvable situation people like to put us in, it is ridiculous and I don't agree with it at all.
Not to mention, it causes further division, which for obvious reasons I won't discuss, nobody should want.
Muslims or Islam hasn't matured enough or one can say that it is restricted or handicapped or too medieval to evolve compared to the other mainstream religions, that it transforms into something meaningful.
Islam is no unified entity, nor are Muslims. And it's not that Islam as a whole has not 'evolved'... it is instead the case that the Muslim world has regressed and in some places regressed to the point where it has never seen in its own history.
But the reasons for it are found in an entirely 20th century phenomenon, and are entirely political. Muslims did not wake up one sunny day and discover something new in their scriptures. No, the times changed, and politics, combined with religion, caused a storm.
For e.g...If one becomes more muslim..then he becomes more intolerant and hate filled for other religons and more restrictive in associating with others and more restrictive to its women ..case in point any high mullah scholar or mufti..
This is false. For an individual issue, I can best use my own example, I have found the opposite, Islam if you are guided to by a hate preacher, you will arrive at a hateful Islamic outlook, if by a sufi, or a serious mainstream preacher, you arrive at a much better version. Specifically, I lived through a turbulent era for Muslims in the West, and deepening my understanding of Islam made me more liberal, more tolerant, more secular, and in thoroughly more European.