Very good article, Toda Raba. As you point out, the situation is complex. Different lines, different interpretations, different propaganda. But the most important point is not if they crossed the blue or purple or the mandat or the armistice lines (but this is an interesting discussion, yes), but rather the potential threat against civilians in Israel. Is it easy for a terrorist with a bomb-belt to cross all those lines and mines and walk down to kibbutz Kfar Blum and cause a massacre?
4.2-scale earthquake felt in Dead Sea, Jerusalem area (Haaretz)
from the article: Israel was infiltrated, but no real borders were crossed