I agree with e.g. Hirsi Ali that the best way to accomplish this is from within, i.e. similar to how the Catholic Church of medieval time was reformed.
That's a good theory, I just don't see how you can do that. Islam is growing, fast. In places/countries that could be considered central to its theocracy not just reform, but free speech is a life and death matter, how could someone even survive to the point of reform if speech and thought is so controlled through violence? The reality is they are more like a Cult than just a religion, I think this makes them pretty impervious to reform. Their central most figure (cult leader) and example is not a living person, but a dead prophet who was a degenerate. I just can't wrap my head around reform, I just can't see what you would reform.
When Mohammed said this, ignore that, but follow this, and who will say it? You have an imam on this side of the street that wants peaceful Islam and one on that side that wants jihad.
Anyway, I am sure you and I more than agree on most this Islam business. I am not arguing against that idea, just that I don't have a lot of faith in its plausibility.