If they do it, then we can do it too.

So lets bomb some sucker nation or assassinate folks we summarily don't like, without due process. F'k it, if they do it, then we can also do it.

How does that make anything better? It results in a degradation of societal values where morals and positive norms are assigned to the pages of history.

There was a time when positive examples, folks standing up and resisting was seen as a something good. Nowadays everyone just does it because the others are even worse. So who should start making the world a better place? The others.