The responses in this thread, so far, are laughable at best.
I'll summarize what posters have stated: because Islam doesn't allow intoxication and the ills of it, Islam doesn't allow paganism and the occult rituals, because Islam will eventually follow other religions (I assume this one means Christianity) in its downfall, because Islam condemns hedonism and human greed.
Comparing Islam to Christianity is a popular tactic in this forum because they feel that Christianity has been debunked to such a large degree that it is powerless in this age. Therefore, it is their hope that Islam will follow in this path. They are mistaken because Islam's history is completely different the Christianity in Europe. Muslims were forced to yield to European conquest and in turn the invaders dismantled and destroyed the traditional Islamic institutions of more than a thousand years. Muslims were denied their way of life by force, and thus living without Islam in Muslim majority lands has been abhorrent to the Muslim for 200 years. The basic psychology of the Christian mind and Muslim mind are fundamentally different. Islam itself is fundamentally different than Christianity. People like to pass on their rhetoric that they believe Muslims will follow Christians in secularization and rejection of God, yet as we see the opposite trend is being observed. Islam has always been an ideology with a tremendous influence on the Muslim mind, it will continue to be in the future. Especially as long as Muslims are occupied by foreign invaders who try to forcibly remove them from their religion to become more accepting of their subjugation. One of the powerful aspects of the Islamic religion is its spirit of resistance and resilience to a foreign threat. Islam will not only live on, it will prosper.
I'm sure some posters may be able to provide more intellectually stimulating answers for a proper debate, but then again most criticism of Islam these days stems from Muslims lack of acceptance of Western occupation of their lands. Muslims are being demonized the same exact way as the Native Americans were demonized by the Americans, before the West stole their land and exterminated their people.
Mostly, they don't like Islam because it doesn't bow down to them. Islam is the truest way of life, the natural way, and the only way for spiritual upliftment of the human being. Corruption and ignorance has reached its peak. Islam is the solution to all human problems.