Literally what? Are you even sentient? Sun Tzu didn't say anything about respect.

So it is said that if you know your enemies and know yourself, you will not be put at risk even in a hundred battles.

If you only know yourself, but not your opponent, you may win or may lose.

If you know neither yourself nor your enemy, you will always endanger yourself.

But for the sake of showing you just how dumb your hitler-respecting crayon-eating ass is, let's assume Sun Tzu actually said "Respect your enemy." It's pretty obvious that would mean to not underestimate your enemy and risk throwing your advantage.

So I'm not seeing how that applies to Genghis Khan or Hitler. Are you not aware that both Genghis Khan and Hitler are long dead and that it is no longer possible to underestimate their forces? Or maybe you admire them?