A kill on Zelaya would be bad enough, killing the other presidents would tip LatAm into a big war, and from the looks of the Honduran military Honduras would not fare well.
OTOH, letting Zelaya land would probably lead to his return to power. It would be another blow for national sovereignty worldwide, and increase the influence of the Chavez axis.
His OWN LEFT WING party threw him out, and right wing latins don't take kindly to being told what to do by a bunch of communist sons of bitches.
The Honduran army, Congress and Supreme court all support the action to remove the communist bastard and the only shot he has at being reinstated is by force from a foreign aggressor.
Baraka Hussein doesn't have the balls to order OUR military into Honduras, they might just round up his skinny communist crypto-muslim ass instead.
If Chavez or any other communist son of a bitch attacks they will need a new puppet, as Zelaya will be dead as a doornail the minute the first shot is fired.
These leftist have a plan all right, and its going to work as well as all of their other plans.
Hey I know what the Hondurans could do. They could send a French Airbus to ferry their ex president and his supporters home.