Satan is the founder/manufacturer of "religion" and facilitating every belief system save Christ.

YOUR STATEMENT has grown from the seeds planted before our time. The deception you are led to consume and distract yourself with.

"Nope, Islam could be true. Or Judaism, or Hinduism, or something else. That would matter a lot. If you were not a member of any religion, then by what process would you decide what to believe, such that this process's output is strongly correlated with how reality actually is?"

Satan is the manufacturer of doubt, confusion, argument, anxiety, etc. these values, attitudes drive the behavior Satan would have you engage in. Most paths lead to Satan's wide road of deception, where what you do not know will be your largest unexpected circumstance.