I believe that Mr Corbyn is a disgrace for many reasons - but this situation is actually not one of them in my view.
As the Leader Of The Opposition, it is his function to question the government's position on a variety of issues, and to question the validity of actions which impact this country, and from this clip, that is what he is doing.
To assume that by doing so, he is saying that the killing is morally or legally wrong, or that he disagrees, or indeed agrees with it, it just that - an assumption, and an incorrect one.
Mr Corbyn is rightly castigated for the times when his terrorist sympathies are to the fore, but that was not the case here, as I see it.