Yes it is.
BUT
when the other side is doing LA-LA, there's no point in farting aginst thunder.
Several key people in the Establishment at present think, for example, that we should 'talk' to the Taleban. Keep up 'dialogue' with Iran. Or do 'deals' with Putin's Russia. (Ha-ha)
This is merely naivety - what I call Wishful Unthinking Behaviour. The mad folks aren't listening. The only thing that will ever persuade them to talk BACK is a very clear sign that unless they do, they won't HAVE anything to talk with.
This sounds brutal I know. Just to confuse you, I am a pacifist in that I think ALL killing is ALWAYS wrong. But I'd rather kill somebody about to kill everyone and everything decent I care about than just wave a white flag. (All this means in practice is that after the deed,I wouldn't try and convince myself that it was 'justified'. Justifiable homicide is an oxymoron.) One simply has to accept the guilt and then get on with life.
The phrase was originally uttered by Churchill, who also said in 1940, "We will fight and continue to fight until every last vestige of the stain of Nazism has been expunged from the Earth". He was right on both occasions.