*1."the demiurge is frequently identified with Yahweh the God of the Judea-Christian faiths" are simply not true. 
 *I have posted sources that say otherwise.  
 *2.The articles Yaldabaoth, Demiurge, and Yahweh make no statements to that affect, either.   
 *Wikipedia can not be used to source Wikipedia. 
 *3.Gnosis is not evil (when its knowledge to control people like in cults). The term gnostic is used by EO theologians to describe themselves (i. e. St. Clement) that vilification thing is a Western Christian (out of ignorance) thing so generalization like you point out is a two way street. 
 *4.There are not even any gnostic texts that use the word "yahweh", and that "yaldabaoth" is a play on "Yahweh" is not clear at all.  
 *Nope sources say otherwise here's yet another  next you'll be attacking John D. Turner. Again please start posting sources. It a burden on you to do so not other editors.