Because their so-called prophet says he is a descendent of Abraham through Ishmael, this is the lineage that Islam has stolen for hundreds of years. This is how Islam fools Jews and Christians. By telling the world they are an Abrahamic religion just like the Jews and Christians, the three all worship the same god. However, should one ever do just a tad bit of research into this, the claim can be disproven within their own contexts. Islam uses the Bible and the Torah to justify its existence. When those are taken away from Islam, Islam cannot be justified in a divine way at all. Whenever a muslim begins to argue with you, tell them you are neither Jewish nor Christian and they won’t have anything to say. When they bring up the Bible ask them if man changed the Bible before the existence of the Qurap how can it be used as a credible resource. And it is the same with the Torah. In other words, make them debate the merits of Islam based on Islam not through the works the deem unholy. You never have to spout one Biblical verse nor do you have to ever spout one verse from the Torah. Get them to argue Islam versus Islam. I have seen so many convert this way. Then when they have left Islam, help them to safety and let them find God in their own way like so many of us did before. Let them explore other religions and see that Islam is of Satan not of the God of Abraham Jacob and Moses. When you argue with the Bible against the Quaran the muslims never hears you. When you argue the Quran versus the Quran then they listen.
When I say let them find their own way I don’t mean abandon them. Be there when they have questions. Allow them to explore other religions and find something to compare. They will undoubtedly see the light. You can guide them but if you push them they will pull away as they feel it will be just like what they have so recently escaped from.
This is the second really kewl thing I’ve learned today. Thankyou for your post about islam!