That's the thing when you put superheroes against actual history. Superheroes are supposed to be mainstream acceptable and beloved figures but what is mainstream, and crucially what is excluded from the mainstream, changes.
WATCHMEN had superheroes in the backstory like Minutemen actually voice the racism, sexism, and homophobia that was mainstream and acceptable at the time. Likewise, Dr. Manhattan and the Comedian participate in the Vietnam War and commit some war crimes over there. Moore was pointing out that in real life, political figures, celebrities and other admired figures did voice racist and sexist views in the 30's and 40s, and that would surely be the case for actual superheroes otherwise they would be seen as commies and radicals and ostracized from society. Likewise, in publication history, many of the comics of the 30s and 40s and 50s, from DC, Fawcett and everyone had superheroes behaving in a racist-imperialist way. Like Superman went back in time and stole land from the Native Americans (
https://www.cbr.com/that-time-superm...st-metropolis/). That was in continuity to Silver Age at a time when Superman was at the zenith of his popularity and cultural influence in comics.
Chip Zdarsky in SPIDER-MAN: LIFE STORY had Iron Man openly be a Cold Warrior and support intervention in Vietnam while having Captain America "loyal to nothing but the dream" being true to his ethos which meant going rogue and defending the Vietnamese people from imperialism on both sides. If Marvel had real guts and had Captain America have an in-character response in the 1960s to Vietnam, that's what Steve Rogers would do morally but Stan Lee or Martin Goodman would never have published that in the 1960s, heck nobody would have. In Marvel's stable, only Jack Kirby was against the Vietnam War.
So I think
Fantastic Four Life Story if it wanted to be political could have had the Fantastic Four break apart over Vietnam with Thing (the voice of Kirby) opposing the war while Reed and Sue are pro-war (both of them being coded Republicans in the 1960s) and Johnny being the "apolitical" teenage guy who doesn't think about how his lifestyle is supported by US imperialism, but that would probably not be fun.