The greatest hindrance to being saved is lack of love for the truth. And this hindrance is not exclusive to Muslims, but can be found in all groups of people. And there is no argument that can change someone's mind about caring for the truth.
Would you abandon the truth for your parents, your spouse, your children, your own pride, your very life? If so you are not worthy of him. Many fall for the trappings of the world and the seed of the gospel does not take root.
I believe once the condition of the soil is right the seed will take root and grow.