A Not Terrible Strategy

I was wondering why would Ukraine wasn't doing more stuff like this.

Turns out, they have. Under this model, Ukraine could prolong the war for 75 years - basically adopting the Palestinian method - only they have several major advantages over the Palestinians: 1) the moral high ground 2) powerful and rich allies 3) bigger and stronger population 4) an enemy with the option of retreat

The Palestinians possess none of the above.