Some years ago, there was a TV program, where a group of politicians were given a scenario where a plan had been hi jacked.
The hijackers, unsurprisingly declined the offer of Stanstead, and winger their way round the skies for a while before pluming for Happy Heathrow, by flying down the Thames.
Meanwhile the cutting edge of Britain's decision makers um'd and ah'd, and called meetings while ignoring the Military advise of shoot the b...blessed thing down. They decided not to where upon it was flown into the HOC.
2 things could be drawn from that program, one that a Politician will do anything to get rid of the opposition, or anyone who might block them from greater office. and 2. They can't make a decision to saved their (colleagues) lives.
At the end of the day, the guy pulling the trigger has been trained and conditioned for just such a thing. If it's a matter of a couple of 100 lives or a couple of thousand, it's not so difficult. Not very nice admittedly, but that goes with the job.