Question

Hello and blessings,
 
In my unit in the army, they’re having a barbecue. They’re bringing kosher meat there are some people who keep kosher, though they don’t see themselves as especially religious. Today they brought hearts that haven’t been koshered not cut open and not cleaned of blood. I assume they’ll just put them on the grill like that. Does that make the whole grill and the rest of the meat forbidden? Or is it only the hearts that I shouldn’t eat?
 
Thank you.