More specifically can non-Muslims use this site to add comments to encourage doubts for those who haven't embraced Islam via rational proof of Allah or even low iman? Non-Muslims will always come from their interpretations of religion (the compromise that created secularism) and Islam. Thus always having the wrong premise for an Islamic discussion. Islam can never be compared side by side with any other ideology as the values are entirely different.
O you who believe, do not take anyone as an insider but those from among your own selves. They would spare no effort to do you mischief. They want you to be in trouble. Malice has come out of their mouths while what is concealed in their hearts is still worse. We have made the signs clear to you, if only you understand. (118) Sural Al Imran.
And Allah knows best.