Now, your are distinguished the terminology will, and then can you tell me each of their roles and function? As why should there be so many kind of differences? And what's the purpose of dividing people into groups, so they can paint different name tags on their T-shirt?
We need to divide people into groups, not as a prescriptive measure but as a descriptive one. I say that someone is "atheist" instead of "theist" for the same reason that I say a chair is red instead of orange, or a stool instead of a loveseat.
The distinctions are useful because they represent different types of belief (or lack thereof, as the case may be).
Sure, you spend time, money and effort in pursuing some sort of spirtitual life, but it doesn't have to be so. After all, say you are in your deathbed, or sitting in row 12b on a plane on a plane nose-diving toward a fiery crash on a mountainside, your odds work in your favor if you just say "Oh Lord forgive this worthless sinner!" or whatever. Worst case, you die and are just dead. Best case, you go to heaven! Having not played the game in this circumstance removes any chance of going to heaven. Here, you are dead, or go dead and go to hell.
The fact that you're saying this betrays a total misunderstanding of anything I've said on the topic.
The worst case scenario is not necessarily Hell (or nonexistence), the best case scenario is not necessarily Heaven, and who's to say that the best-case scenario of being an atheist
isn't Heaven? What sense does that make? For all I know, there's a god up there who
wants me to be an atheist, and appreciates my acknowledgment of the fact that his existence can't be proven.
The worst/best case scenario of believing in the Judeo-Christian God is the same as the worst/best case scenario for believing in nothing; in either case, I could think of an extremely positive or negative hypothetical scenario post-death.
Also, just because there are infinite possibilities for a deity, you have to make the assumption that the more popular ones are closer to the truth.
Why? This doesn't follow whatsoever. Why should I believe that a god is more probable simply because more people believe in him? Hell, why should I assume that the true metaphysical nature of the universe even
involves something I would consider a "god"?