@Ignited Mind
First of all, you can't force someone to convert to a religion. If that person is sincere to his indigenous religion, he will keep it in his heart and mind. Isn't it a failure on your part if you so "forcibly" convert?
Second, nowhere in the Quran does it say that you have to spread Islam forcibly. The Quran says to be tolerant to other religions, you be on your path, and I'll be on mine. Of course you will believe that Muhammad PBUH sread Islam by sword because you only read Western sources, dear.