If a man treats his sisters, mother, and other female family members with kindness and respect, can it be expected that he will act similarly towards others?

No, because those are women in his circle. The way people treat those close to them isn't always indicative of how they'll treat others

What Raqi said. It shows he is capable of being decent to women he loves, but doesn’t mean he’ll be that way to all women whether he loves them or not. I also find that a lot of men that were raised by single women are super resentful despite being close to their moms.

Ditto to the other ladies. Men are good at compartmentalizing their family versus women they’re attracted to in the way they treat them and humanize them from my experience. Obviously it’s a green flag if they treat them well but yeah not a green light 😂 still gotta look both ways before you cross the street or whatever.