There's a couple of things that have fed into that over time.discord wrote:it really is fascinating how the 'surrender monkey' meme has gotten so strong.
The first is the propensity for the USA to hate France on occasion. If England is the USA's mother, then France is it's father, and there's nothing cooler than hating your father as you grow up.
Facetiousness aside, it tends to roll in cycles. There are times the USA love France, and there are times it hates France. More recently, there was an upsurge of hatred since France did not immediately side with the USA on certain actions of global policies. This resulted in stuff like "Freedom Fries" and other obnoxious behaviour feeding into things. As time goes on, the hate will dissipate, and the US will return to loving France before they find a new excuse to hate on them. It's very much a tsundere relationship.
The other part of that is Star Trek.
You read that right. Captain Picard, especially in his early iterations, was characterised as a Frenchman despite speaking in a very british accent. He then went on to surrender to everything. Q. Klingons. Ferengi. Space mold. You name it. He surrendered so often in the first few seasons that it kind of fed right into a generation of sci fi fans. Combine that with the aforementioned upsurge of cyclical hatred for France, and you can see why it's so widespread.
There's other stuff too of course, like random occurrences where the USA bans a certain kind of French cheese, or an American tourist wonders why the French are so rude to them why they can't speak American... or they're in Paris and simply didn't know that Paris is a quarantine zone of rudeness. Also, Fox news' so called "No Go Zones", much to the amusement of the French. And anyone with a brain.
All in all, there's a large cultural milieu that feeds into anti-french sentiment that tends to cycle between love and hate over time, at which we're currently at the peak of hate or somewhat past it and on the decline as far as I can tell.