It's quite interesting to watch George A. Romero grapple (badly) with the pressures of Feminism in his zombie movies.
The first three came out during the rise and heyday of the Women's Lib Movement; and his work was singled out for especial criticism accordingly.
To be fair, Night of the Living Dead was absolutely patronizing to its female characters. In Dawn of the Dead, he portrayed Francine as a strong woman, who even delivered a Feminist mini-speech halfway through.
By Day of the Dead, he went one better and wrote Sarah as the actual protagonist.
She arrived wearing a feminine version of Indiana Jones's best adventuring outfit. She barked so many orders that it was obvious that she was in charge. It took until about half an hour before we even realize that she's not the boss, she's just one of the scientists.
Yay for strong, competent and intelligent female characters! But oh dear on just about everything else.
The sexist speeches in Night of the Living Dead were casually delivered. Those saying lines equating women with helpless children weren't trying to be offensive. That was genuinely their world-view and it would have surprised them to know that it was wrong.
By Day of the Dead, the speeches were in your face and aggressive, designed to intimidate Sarah with shows of strength (including actual slaps across the face) and threats of rape.
The comments were framed to depict just how nasty the power-hungry soldiers were, rather than anything particularly anti-female on the part of the film-maker. They were uttered from the same mouths which called Johnnie a 'jungle bunny' and Miguel a 'Spic'. Repeatedly.
Rather more subtle was the fact that the only Irishman in there was depicted as constantly drunk.
I'm not saying that those army men had to be politically correct, as that would have been out of character. But the sexism and racism were hurled in lieu of anything else clever to say in the script.
What happened to the sentiments in the first two movies? There the color of the two black men didn't even draw comment. This one just felt puerile in comparison.