Cavalera is a hardcore Christian for all I care. Just look at how much he discusses this shit.
You might be surprised by the number of non believers who find religion and interesting study.
The funny thing is that we weren't even discussing Christianity here.
And to those still confused about the term "agnostic deist", think of this way. I believe because I
choose to believe (therefore, without certainty) because, to me, it
looks reasonable ... not because I'm strictly and purely led by logic and reasoning to do so (which implies certainty of faith).