They are seeing that the price for HUGE virtue-signalling and unbridled immigration they have done for the last 50 years.
There are few actually French people, now. Maybe YOU know a truly French person. But your grandkids certainly won’t. Like Spaniards–have you ever met a Spaniard? Maybe, though rare. I bet the only Spaniard your kids have seen was when their parents watched “The Princess Bride” with them.