Do you have a quote/cite where she calls for Socialists to unite in order to defeat "the entrenched foe"?
No. Bravo's nutjob source seems to draw it from this...
"Through its own internal feuding..the SP [Socialist Party] exhausted itself forever and further reduced labor radicalism in New York to the position of marginality and insignificance from which it has never recovered. The story is a sad but also a chastening one for those who, more than half a century after socialism's decline, still wish to change America. Radicals have often succumbed to the devastating bane of sectarianism; it is easier, after all, to fight one's fellows than it is to battle an entrenched and powerful foe. Yet if the history of Local New York shows anything, it is that American radicals cannot afford to become their own worst enemies. In unity lies their only hope."