The host's intentions might have been to make the guests happy.So you're saying you would believe that your host intentionally hired a caterer that they know would poison the guests on the most important day of their lives?
The same way Trump's intentions in inviting Tony could have been to entertain the crowd.
The caterer fucked up. So did Tony.
And just like in your scenario where the host made a mistake hiring the caterer, Trump made a mistake inviting Tony.
So both are guilty.