I guess the difference is that the US culture has much more respect for businesses, businessmen, entrepreneurs, etc. because of our heavily individualistic and capitalistic culture. I would assume that the French don't have that as much.
In short, that's it. We always lived the US(/anglo-saxon) economic model as something we underwent. It has broken the other kind of model French tried to build, one model which wanted to be universalistic, that may be why we always had some problem to accept it... In short a model that put the emphasis on some principles for an harmonious society in which everyone should be equal I would say, while US have put the emphasis on the freedom of the individual and his personal success overall.
Still, I'm surprised the French population supports this, considering that managers are people too, with lives, families, etc. and that it probably wasn't their decision to lay the people off.
Well, that guys are seen as "collaborators"
The French translation of that word is
very pejorative in France (it has to see with guys who helped Nazis during WW2). Well, by no means it is that heavy in the minds of people but I tend to think that if bossnappers have an enough big support and if bosses who are just some high executives of global companies are not supported it has to see with that kind of feelings. They "collaborate" with global economy... But, one more time, I think there is a lot of distance with the WW2 reference.