Does "the" necessary in front of people? and what does it mean? And what's the difference from the next fragment "a people who will not~"?
"The" is necessary in front of "people" here because "the" makes it clear that a specific group of people are being mentioned rather than "people" in general. "The people" in this context refer to "the French people". "A people" is a term used to refer to nation, tribe, or community, so it has the same meaning as "the people" in this context.