Depends on your morals.
That is the thing about morals... NO ONE has their own...
We have none? We all have the same? Or we have somebody else’s?
Damn ignorant proposition in my opinion.
Morals is the nothing more than the attempt ‘to do right’ whatever the individual might see that as (not always correctly).
To say nobody has any morals of their own, to me, says nobody has their own conscious behavior for which their actions are derived from.
Not to mention the ever evolving inclusiveness or ‘Morality’- one day something’s bad/wrong then next not so much…
And by your own previous quote-
Right... Nothing is fair in life, love or war... Try to be happy with what you get, and personally try to be fair, and when fair is cruel, then try to be kind...
You infer your own set of morals by drawing a line between ‘fair’, ‘cruel’, and ‘kind’.
As for the original poster’s question-
It’s an interesting proposition to say the least
To say ‘No’ implies there are boundaries to what tactics/weapons may be employed- but as others have previously said ‘life is not fair’. Aka it’s going to happen even if you don’t agree or like it.
To say ‘Yes’ invites a total lack of control and opens oneself to atrocious harm- resulting into a dehumanizing condition cheapening the meaning of love and pushing the boundaries of warfare into cataclysmic atrocity.
It’s a question without answer yet I think.