The hidden supposition here seems to be that all theists apparently believe in a god who:
a) offers some form of life after death, and
b) is sympathetic to the human condition.
I don't identify as being an atheist. Actually, I consider myself more of an agnost, but if anything, I'm more of a theist than an atheist. However, even if I acknowledge the existence of some kind of god, I find it a bit too presumptuous to accept the two stipulated assumptions above as a given.
I also find the fact that you seem to think there are people out there who are suffering to such a great degree 'that it is beyond your comprehension' a bit insulting, since you apparently, as a self proclaimed spokesperson, are capable of comprehending the suffering of these people. Why can't I? You surely can't be addressing atheists as a group, since you call yourself an atheist.
Finally, you seem to find the concept of a life with 'meaning' very important, since you bandy this word around a lot. But you never qualify what, according to you, makes a life have 'meaning', as opposed to it being 'meaningless'. Frankly, I reckon you should try and form a definition about what would constitute a 'meaningful' life for you, because without that definition, this whole post reads as a rather meaningless diatribe against atheists. And yes, that last meaningless was deliberate.