Wasn't there a non-spazzy way the ambassador coulda finished the job?
Why smash through his own gate on the way to the church, why not just open it? He really didn't need to attract police attention.
Okay so maybe he was rattled from the nanny, but what was his plan to begin with?
Why not put in a little advance planning since the fate of the world was at stake?
How about coming home with a detail of armed guards to sweep the house and get rid of any vicious dogs or psycho nannies?