Convinced (I'm going to assume, correct me if I'm wrong) by an entire childhood of being called Muslim by parents who decided that for him before he was born, and surrounded by other Muslims. By chance though Islam is the religion that feels right to him, what a nice coincidence.
"Adulthood is like looking both ways before you cross the road, and then getting hit by an airplane" - sarcasm_only
"Ironically like the nativist far-Right, which despises multiculturalism, but benefits from its ideas of difference to scapegoat the other and to promote its own white identity politics; these postmodernists, leftists, feminists and liberals also use multiculturalism, to side with the oppressor, by demanding respect and tolerance for oppression characterised as 'difference', no matter how intolerable." - Maryam Namazie
"Ironically like the nativist far-Right, which despises multiculturalism, but benefits from its ideas of difference to scapegoat the other and to promote its own white identity politics; these postmodernists, leftists, feminists and liberals also use multiculturalism, to side with the oppressor, by demanding respect and tolerance for oppression characterised as 'difference', no matter how intolerable." - Maryam Namazie