The ‘professional left’ could have:
1) a gun to their head
2) held by a Khmer Rouge communist,
3) with Mao banners all around
4) a whole crowd quoting Karl Marx
5) a Stalin look-a-like giving the firing orders
6) witnessed by a crowd including Norm Chomsky, Bill Ayers and Fidel Castro
....and still bitch that the bullet just entering their head wasn’t ideologically pure enough.
I heard it a little differently: complain about lead from the bullet being environmentally unsafe.