What we learn is why Avraham Avinu sent Yishmoel away, even though Yishmoel was his own son. Yishmoel was a pere odom, a sociopath, who would have been a spiritual and physical danger for Yitzchok Avinu and for future doros yeshorim. He had to go. Far away. Plain and simple. (The lefties love to say how much better things would be if Avraham Avinu had not sent the pere odom away – the answer is that we might not have been here today if he hadn’t sent Yishmoel away.)
We need to root out the sociopaths whom we now tolerate or even adopt as mascots in our shuls and neighborhoods. They are not harmless characters. They are nuisances at best and dangerous at worst. I found out recently that a supposedly harmless character from my old neighborhood, a nut who pretended he was a chazzan and even made tapes that he sold, is actually a molester. He’s not the only one – and his whereabouts are now unknown because he realized his time was up.