The letter also explicitly rejects forced conversion, and asserts that the Koranic insistance that there can be no compulsion in religion supercedes any other verses or haddiths that might be interpreted otherwise.
The problem is you have Muslims in countries where they are a majority burning buildings belonging to other faiths, murdering anyone who dare present an alternative religious view and of course they love to beat their women.
Their whole culture needs to be flushed clean and I really hope they do it internally before they make the rest of the world fully deal with it.