@ SJ
You wrote: “because NK is a/the public vocal face of tochocheh against the heresy of zionism that is targeting the sheomrei torah umitzvos communities. So, actively undermining the messengers that are trying remove heresy MIGHT be as guilty as trying to promote the heresy amongst yidden, hence masis imadiach.”
1) There are other public, vocal faces of tochocheh against zionism. For example, Both Satmar factions in the U.S and the Eidah Hareidis. None of the above feels the need to be m’chanif terrorists and dictators in the way N”K is doing.
2) Your svara for who qualifies for masis u’mediach is very interesting. I would like to explore it further. Here is a hypothetical case. Lets say a thief, rapist, or murderer publicly, and vocally spoke out against zionism. Would someone who criticizes him for his crimes be a masis u’mediach according to you?
The one thing I can say about this svara is that it is consistent. Sometimes a svara can be logical and reasonable yet still be wrong halachically. This svara of yours does not suffer from such a problem.