Many atheists want to be able to be atheists without being dragooned into some boring noisy unsubtle bad-tempered "movement". Many other atheists want to be able to be overt explicit unbashful atheists without constantly being told to be more euphemistic or evasive or respectful or just plain silent by other atheists, who surely ought to know better.
This "who surely ought to know better" is one place where the disagreement really grips. To the first group – let's call them plain atheists – this idea looks like typical political hegemonising, like ideological policing, like the demand for uniformity and agreement and loyalty that always goes with a "movement". It looks like groupthink. To the second group – call them movement atheists – that's not it, it's just that other atheists should understand that euphemism and respect have been the norm for a long time and we really ought to be allowed to talk freely.The rest is really good.
(Now about commas.... Snazzy! It never occurred to me you could drop them for effect.)