So you would be happy for a foreign "spy" agency to take details of your passport as you went through that countries airport.
Then for them to make a fake passport using your personal details, then to fly an assasain round the world killing people, using your passport.
That means YOUR details would forever be on every database at every airport in the world as a possible spy, and if at some later date you fancied going on holiday abroad you stand the chance of being arrested at that airport (or even at best stopped and questioned).
I am not sure I would like MY personal details used by a foreign assasain organization in that way.
And can you imagine if you fancied going on holiday to the middle east (Israel, Dubai etc), it would be even more risky, you stand the chance of being killed yourself.
THAT is what the row is about.