I think the author is making a mistake by characterising all libertarian islamic thought as being 'Murjiite'. The Murjiites were a specific historical religious and political movement and we really don't know all that much about what they believed and how they put that into practice. Furthermore since a Murjiite assassinated Ali, calling modern Muslims Murjiites associates them with that act in a way that's wholly counterproductive. Other than that I enjoyed the article and found much to agree with.