Hello Sulaco and welcome on this forum. I'm French and I don't think this crisis is very serious. French are not for this war, American are for, but that's not a big deal... And we stay friends.
However, for Peugeot, if they come back in the States, it won't be before 2005, so this crisis will disappear as quick as it appeared and won't have consequences on the PSA decision to come back in the USA.
And (it's unofficial) Peugeot would come back in 2006 or 2007 with the new 407 then the 607. Note : the new 607 (restyled) and the 407 are on the US norms...
Your 505 is very nice, here in France, we don't see any more "nice" 505, they are all old but not enough to be collectable
But Jean-Martin Folz (CEO of PSA Peugeot-Citroën) told that Peugeot would surely come back in North America, but he didn't say when.
And that's logical as PSA sells everywhere except there (Japan, Asia, Australia, Africa, Russia, Europe, South America, etc.).