system
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human
CMV: Kids father dies, whole grade goes to funeral. I think it's inappropriate and that we should just let him have his space and stop pretending like we all care.

Basically a dude in my grade's father died of a heart attack.  Obviously it's sad and all but a huge chunk of my grade has decided to go to the funeral tomorrow morning (and also to sit "shiva".  This is in Israel.) IMO they are all going mostly to miss school but they'll never admit it. Anyway,  i just think it's inappropriate for a bunch of kids who only know this dude by name and have certainly never met,  seen or even know the name of the Father to go to the funeral.  Honestly,  I think it's just fake as hell to go to the funeral, say something like "I'm sorry for your loss.  Your father was a great man" when I've never even met the guy.
gpt
Funerals aren't about the deceased, they are about the survivors.

I suspect most of your classmates have imagined how they would feel if it were *their* father who had died and felt empathy.  

Assuming that as an Israeli you are at least familiar with Judaism, it's really the spirt of the Mourners Kaddish, where the grieving stand up to say their part, while the congregation chants along with them.  Even though they might not know the person who is grieving, death touches all of us, and feeling the support of the community can help.

No, you don't need to go there and lie about how much you loved his father.  But you can say that you're 'sorry for his loss' - which is what most of your classmates will do.  Even if they didn't know him, you're part of the same community, and it's good to know you have the community support when the same thing happens to you.