I don't care about his mom's car accident
How did you come to find out about his mom's car accident?
There was a loud ambulance noise outside my bedroom window. I opened the window and looked out and saw what was going on.
I can't believe you wouldn't care about something as serious as that. It is wrong to not care about his mom's car accident. Being dismissive like that will cause others to dislike you.
They don't care about me, so I'm going to treat him and his mom in the way that they treat me.
Car accidents are serious things and he and his mom need your support, not your dismissiveness. Be there for them even if you feel as though they haven't lived up to your standards in the past.