This headline from the right-wing site Breitbart was amusing, giving prominence to something that should be taken for granted.

The nerve of Venezuelan president Nicolas Maduro! Surely he should know that US troops have the right to enter any country at any time and for any (or no) reason and that the only appropriate response is to greet them as liberators and welcome them with flowers? This is why anyone who attacks American troops in Afghanistan and Iraq is automatically branded a ‘terrorist’ and thus subject to the harshest treatment.

Now on the other hand, if any foreign troops were to invade the US, …