Complex sentence: Hicks had a publicly viewable Facebook page when he turned himself in; he described himself as an atheist and an anti-theist, and reblogged numerous atheistic image macros which condemned religion and religious violence.
Split into simpler sentences: Hicks had a publicly view-able Facebook page when he turned himself in. In the Facebook page, he described himself as an atheist and an anti-theist, and re-blogged numerous atheistic image macros which condemned religion and religious violence.