Lake, Jews in those countries are forced to take that stance, but they are not justifying Hamas. They live in countries where they would be in mortal danger if they show support for Jews living in Israel.
What NK(or rather, the tiny, miniscule fraction of NK) does in America and England is far different. They are essentially condoning terror attacks in their view that Jewish lives can be sacrificed to dismantle the state.
Truthfully, that faction of NK are the flipside of zionists, with the eame core problem. Zionists claim that the state is so important and vital to the Jewish people that it can justify the loss of Jewish life, while the NK faction says that eradicating the state is so important that it justifies the loss of Jewish life.
They call this horseshoe theory; two radical ideas on opposite ends of the spectrum really are the same in practice.
Radical NK decided that the halacha follows the maharal(or rav yonasan eybeshuts, i forget which) who says that the 3 shavuos are yehereg velo yaavor. Who gave them the authority to pasken that way? They themselves did. And then they think that yehereg velo yaavor means that they can put OTHER people in danger, when it is only used to require one’s self to give up their own life if faced with the 3 chamuros. If goyim would force us on pain of death to violate the shvuos, that shitah holds we must let them kill us – but we cannot put other jews in danger to prevent them from violating them…plus the shevuos were already violated, and jews living there(including NK!) Is not a violation.