So, let us endeavour to follow J Carroll's reasoning:-

He thinks we should intervene militarily in the internal affairs of such Middle Eastern states as he dislikes the governments of;

military intervention would inevitably involve killing some of the people there;

who are Muslims;

so British troops would be killing Muslims;

which would provide a comprehensible incentive to British citizens of Nigerian origin who have changed their religion for beheading British soldiers in the streets of London for political reasons.

Have I got that right?

~M~