This is is long discourse, painful and difficult to read, but the reported fact is that Islam is the fastest growing religion in the west.
One argument, we use in the west is, that you are entitled to your opinion, but not your facts.
In private, all of us have some questions, some very penetrating and provocative ones, about religions that we follow - importance of a cow, making idols of stones, and then worshiping them, that is level one, that is first reaction, but when you go to level two, think through a little, a lot can be explained, Hinduism revolves around agriculture, so cow is important, a life giver. My Hindu friends have told me, that an idol is just a way to concentrate on God.
If all of us come from Adam and Eve, then yes brothers and sisters produced children, that is how we became seven billion. Egyptian royal family members routinely married amongst themselves, but as science evolved, and we learned the dangers of serial cousin marriages, the practice was discontinued.
There are some eternal struggles - logic, science, evidence based, and belief, faith, no questions asked, is one.
I think, if we clean up our language, we can learn from one another.
Living in he west gives us greater leeway, still, we should try to be civil, and not hurt one another's feelings. At level one, we are are all Muslims, except 2-3,
Level two, maybe that some of us have decided to go away, recent upheaval in the Muslim world has caused a lot of stress, particularly amongst the young, they can see only negatives of Islam - I know of a medical doctor, who converted to Christianity, he is married to a Christian.
My logical reason for being a Muslim is, that it is most improved of the monotheistic religions.