Though that chant is used by different people for different reasons, it's origins were refering to the Palestinian borders drawn by 1949 armstice agreement following the Arab-Israeli war. Of course to Israel and allies, this solely translates to the end of Israel as a state. And to be fair, some people/groups I'm sure do mean it that way, but certianly not all. I'd say the majority don't mean that. So, still, nothing about this conflict is simple.
This also is a good time to mention that Visegrad24 has some pretty clearly defined political leanings. That tweet's (X's?) assertion is one example of that.