You are no more a Christian than I am. ...I do not agree that religion is defined by truth claims.
I have seen a very recent filmed discussion in which you described me as one of the most Christian people you know. This came after you quoted Roger Scruton as saying to you that you act like a Christian, you behave like a Christian, therefore you are a Christian. But Ayaan, that is so wrong. How you, or I, behave is utterly irrelevant. What matters is what you believe. What matters is the truth claims about the world which you think are true.
For that is the whole point. Christianity makes factual claims, truth claims that Christians believe, truth claims that define them as Christian. Christians are theists. They believe in a divine father figure who designed the universe, listens to our prayers, is privy to our every thought. You surely don’t believe that? Do you believe Jesus rose from the grave three days after being placed there? Of course you don’t.
Membership in some religions, like Judaism and Islam, is defined by being born into the religion.
Christianity can be defined by believing in the Nicene Creed, but I don't think that is how most people use the term.
Dawkins almost passes as a Christian. He has Christian cultural values and morals. He likes Christian customs. He grew up with Christian influences.
People become Christian to adopt Christian spiritual values. Many devout Christians have doubts about their faith, but they are still Christians.
I don't think Atheism is defined by factual claims either. When atheists have conferences, they do not spend time examining factual claims. They are more likely to discuss politics.