People are seriously over-board.
I went to a site where I post other material and got the comment that I have been “randomly deciding which christian sect is right”, and that “I chose my religion because it is the thing” and “it is from where you were born that you choose Christianity, not from divine powers” … Whew, these comments show me that there are some sick people out there needing God.
Even if I had a rational answer for this guy, he would not understand what I am saying because he is not a believer in Christ.
Our religion is foolish to other people; as the bible says;
For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God. ~ 1 Corinthians 1:18
It is not even worth explaining to a person who has no ears to hear.
Beware if you are trying to share your faith, because faith falls on deaf ears if they are not genuinely seeking, or do not have the Holy Spirit.