I've nothing but respect for people like Yusuf but the sad fact is, Muslims will NEVER be ready to reform Islam. The Quran makes this IMPOSSIBLE because any attempt to reform or change the doctrine means you are challenging the unquestioned infallibility of Quran-Islam-Prophet. 2 problems with this :-Since you are a kid, I will suggest you to stop attending those shakhas and read a little bit to open up your mind and learn to take criticism.
Now coming to the point you mentioned above. @Yusuf will be the first one to be haunted by his own community if he suggests any reform and people like him are in a minority. But that is not even relevant to the argument.
For some time, put aside your emotions and think logically. There are good humans everywhere and that does not depend on being a Hindu or a muslim. People are good by nature but that should not cloud your judgement on fighting an ideology. Islam is an ideology and it makes its practitioners go crazy everywhere and not just in our neighbourhood and India. And how do you defeat it? By first acknowledging that there is a problem. Once you do that you can talk about realistic solutions to the problem and how to cut down on your losses before making any gains.
1. Any such attempt would be considered bid'ah (innovation), look up what is the mainstream Islamic theological position on it. Muslims are always accusing each other of this grave sin which causes conflicts among them. The Quran also accuses Jews & Christians of manipulating their own books, which is the root of many inter Abrahamic rivalries.
2. Challenging supremacy of Quran-Islam-Prophet means the whole Islamic doctrine collapses. It's a set of absolutist assertions, all it takes is finding one flaw and the entire doctrine will be proven false. This is why they try to block any criticism or introspection. Islam as a religion has nothing new to offer other than this last book-last prophet-infallible final revealed religion feature. All the stories in Quran are re-hash of Biblical stories with slight differences. Brought back Tawheed (oneness of god) from Judaic teachings and discarded Christian trinity.
Trying to rewrite the Quran means you are admitting that it's a flawed book and infallibility of the book is the corner stone of Islam. It means everything to them.