Martin Luther Reformation (and stuff like the Calvinists and the Anglican Church) were only accepted because they came from within the church. There was authority behind this.
Similarly the hermetic reformation (which accidently lead to the birth of science as we know it, 200 years later): It was driven by artists and outsiders, but they were able to win over religious authorities to their point of view. Including Pope Alexander VI. And while the hermeticists were eventually reduced to a rabble of religious whackos, they left a cultural imprint that can still be found today, 500 years later.

Islam is structured differently: There is no accepted central authority that could lend power to any reform. A top-down-reformation is therefore impossible. The only thing that would work is changing the cultural mind-set of the Muslims to a more liberal one, changing the belief by changing the believer.

There is something obnoxious about Harris and Maher telling them what they need to do. It's just another form of cultural imperialism that Harris can place beside his advocacy of war on a Muslim country.

It protects those we don't want to criticize, but allows us to run roughshod over those we do.

I'd argue that fundie Xians and gang bangers are each in a culture different from my own. I don't see anybody screaming cultural imperialism when somebody says that either needs to reform. In fact, I regard such claims often as a way to say, "There are facts too offensive to be said, however true they are and however important it is to recognize them. Instead, we'll make up a story that not only denies the ability to state the facts, but instead says that somehow these are worthy, important cultures." Well, not the two I named. Others, no less virulent, are what I have in mind.

I really do not care what he has to say

accepted in some places.

I'll fight to the death for the rights of women to wear hijab. (And by that I mean hijab. I don't mean, as is often described in DU, just popping on a headscarf and taking it off. Hijab is a way of life that includes a headscarf but also includes many other acts of "modesty" that are required of women but not men.) I think hijab is a misogynistic custom, but it is a religious practice.

Burqa is just institutionalized secular abuse whose purpose is to erase the public identity of the woman, and I think it should be banned in the US. When people whose traditions include cannibalism and slavery and trading of women come into the US, we don't say, "Well, it's their custom so we have to let them do it." The burqa is the same.

what reforms are needed.

More simplistic cultural imperialism from a country that loves to decide for others what is acceptable.