A Quick "Thank You" to Fizziks

I want to thank "fizziks" for taking the time to address my piece entitled, The Fizziks Ostrich.

And while he did an admirable job explaining why it is that he prefers Democrats to Republicans, he did not actually address the question.
The question is this:

Is it true, or is it false, that the primary venues of BDS and anti-Semitic anti-Zionism in the West today primarily come from the progressive-left, including the grassroots / netroots of the Democratic Party?

What is the answer?
{Anyone?}