You missed the point. The point the other guy made is that for the past 50+ countries have turned a blind eye to Isreal not playing by the rules and that has let Israel become more and more ruthless to a point where they’re the ones effectively committing genocide. Maybe Ukraine won’t turn out like Israel but is it really the door we want to open?
Just because Russia is getting increasing more violent and inhumane doesn’t mean Ukraine should follow the same path. Nobody is saying Ukraine shouldn’t defend itself (or fight on Russian soil), we’re just saying we shouldn’t turn a blind eye if Ukraine starts shelling humanitarian corridors, chopping off legs of prisoners, gas striking the front etc.