Is secular humanism a religion?

Critics of it would have us believe so. Varieties of secular humanism, like religions, have core sets of values. It seems to me, though, that for a set of beliefs to be considered a religion, it must include a distinguishing requirement for a leap of faith. What would Christianity be without the resurrection or Judaism without Moses receiving the Torah from God or Islam without Mohammad receiving the Koran from God? This is where the faith in “religious faith” comes into play. How can you build a religion on a set of beliefs that are taken to be self-evident?

I wonder if it would be possible to build a secular equivalent to a religion based on actions as well as beliefs. Instead of just signing on to a set of values, a follower might commit to putting them into practice by, for example, pledging do some volunteer charity work. I know that religions do a lot of charity work, but there is no requirement for someone to actually do anything beyond taking the leap of faith and acting morally.