From the context, which is "the problem of race" (Pound's phrase) I don't think "murderer" is likely.  
I supposed Pound was alluding to the Shashai because in the Book of Ezra they are listed among those who had been found guilty of intermarriage:
 
"Then Ezra the priest stood up and said to them
'You have been unfaithful; you have married foreign women,
adding to Israel's guilt.'
The whole assembly responded with a loud voice:
'You are right! We must do as you say.
But there are many people here and 
it is the rainy season; so we cannot stand outside.'"
 (10:10-13)
 
Though, if my supposition is correct, I don't know why the Shashai have been singled out from a rather lengthy list of men who were said to have angered the God of their fathers by taking foreign wives.
 
Tim Romano
 
----- Original Message ----- 
From: Martin Knepper <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, November 18, 1999 9:30 AM
Subject: Re: Schaschan?
 
 
> >Are the 'Schaschan' to whom Pound alludes at the end of broadcast #43 (31
> >May 1942) entitled 'Brain Trust: Second Spasm'   --"Who are the Schaschan?
> >I ask you?"--  the _Shashai_ mentioned at the end of the Book of Ezra?
> >
> >Tim Romano
> 
> I think Pound is thinking of the chinese term sha-shang, meaning to kill and
> wound, inflicting causalties on etc, and can be used (especially in
> classical chinese) in a nominal form, too.
> (I do not know the broadcast, would murderer or so be suited?)
> 
>