I take the "when in Rome...." approach. If you are in another country you should abide by their social protocol when it comes to dignified greeting. I wouldn't see it as a sign of weakness, but rather one of willingness to cooperate.

Now if it happened here I could see it as being a big deal, but jeez....

and for the record, I didn't vote for Obama either but I think all of this whiny nit-picking over every little thing he does "wrong" is just childish. Granted it's happened to some extent with every president we've had recently.