What do you do when people identify first by their religion ? Islam is quite problematic in this aspect. AFAIK the current resurgence of political Islam stems

What do you do when people identify first by their religion ? Islam is quite problematic in this aspect. AFAIK the current resurgence of political Islam stems from its very core. Maybe it could be reformed to be (durably !) compatible with a secular state, but would that reformed religion be still Islam, or would it be as different as Christianity is from Judaism ?