Yaakov Schwartz (who Ziongate thinks is Joseph) also seems to a be a super anti-Chareidi writer for an Israeli newspaper. So, it’s all very clear now:
ZionGate is Yaakov Schwartz, who is Joseph. Why else would he know all of this? ZionGate is the account he uses to voice his real opinions, Joseph is the account he uses as a composite of all Chareidi anti-Zionists to “argue” with. ZD is a third account he uses as a more mild mannered version of himself. I still haven’t figured out what he uses his DY account for.