I think it's really important, I'm currently in a battle with my wife about my son. We are divorced. My wife is a horrible fit for my son and he lets me know it every time he's over.
I'm a perfect fit for him. I don't stress little things, she does which just causes him stress and unhappiness. Leah is wrong, goodness of fit is the difference between great relationships and horrible ones.
My son and I just click. The stuff that frustrates his mom hardly bothers me (like leaving clothes on the floor or elbows on the table.) About your story, it's cool you let your son talk to those guy's. He seems like a good kid, he asked you if he could hop over, he was nice enough to treat the day laborers like friends and play ball with them.
I'm guessing he has compassion for them and thought they might be bored. My son once asked me why they stand there all day and added "that's sad." Bravo to you on being a good mom.
I think it's pretty important, but not a very common concern. As in, I think parents and their children are more often a "good fit" than not. If a child is outgoing and inquisitive, I think it's the parent's responsibility to nuture that, even if they're not those things.
ETA: I don't spend enough time here anymore, my troll radar is weak. Didn't even read the Mexican day laborers bit. Lulz.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.