Hope is vital for humans. It´s like having oxygen in the blood.
One cause for hope regarding the West surviving and limiting the negative effects of people following Muslim law, Sharia, is that if there will be more Muslims in the West than today, Westerners is confronted with a challenge. The challenge is how to deal with the new situation and the circumstances it produces. This challenge will make a lot of people look into what values are true. It will be a philosophical quest and also a spiritual quest for many Westerners. This will make Westerners even more evolved as human beings. Many of them will decide also if what they believe in is worth putting in action and worth taking a stand for.
What is hopeful with this is that when Westerners in this way develop to the highest form of human beings that has ever existed they will act in ways that is difficult to predict today. These actions may very well be very good and successful, leading to a wonderful world to live in - it is simply impossible today to tell what Westerners will be like when they are even more evolved and what they will do. Not only actions but being itself may produce positive effects: Eckhart Tolle says in The Power of Now (the audio book) that more consious persons make positive effects in less consious persons.
