Marquette professor of law and far-right media celebrity Rick Esenberg, who for whatever unknown reason decided to affirm pretty much everything I wrote here, tells your scribe to "go read Sartre."
I first read Sartre 30 years ago. While I have not read Being and Nothingness (who has*) I have read much of his fiction and his mordantly funny autobiography and any serious student of Sartre (which I am not) will tell you that the most effective exposition of Sartre's philosophy resides in his fiction. So maybe Prof. Esenberg should "go read" The Age of Reason (and keep "going" from there).
By the way I have enormous respect for Prof. Rick. He's extremely knowledgeable and he's actually a pretty good guy. It's his unseemly dalliances with the wing-nut element — who frequently laud** Prof. Rick's conclusions without bothering to investigate his premises or, as is sometimes the case, to identify his missing premises — where the respect collapses into great fun, not so much out of disrespect for Prof. Rick but rather for the dalliances and the wing-nuttery.
And the latter particular species of disrespect is not condescending because the wing-nut element begs for it continuously, so in a sense it's more correctly something of an act of generosity of spirit (not to mention an act of public service to the general political discourse).
* Other than masochists unsatisfied with reading Being and Time.
** See, e.g., Journal Communications' C. Sykes, P. McIlheran, et seq.