In summary: calling evolution or secular humanism a religion is a weak play, intended to give the faithful a fallback position to retreat to when, in my opinion, they have lost the debate.
SCOTUS disagrees...
Fellowship of Humanity v. County of Alameda. Check it out. One of their Holidays.... Darwin Day.
Secular Humanist themselves disagree, and do in fact consider themselves a religion. Any simplistic google search would reveal that....
