I'll be honest, I didn't cry at my one grandmother's funeral either. I was sad for my mum losing her mother, but this woman treated my father and my brother and I like shit over religion so we weren't exactly close. So it really depends on what his relationship was like with his grandmother.

maybe not judge him for not being close with his grandma? you sound like a c***

Was he even close to his grandmother? If his tattoo artist gave him a bunch of tattoos, he'd have been very close with him. Perhaps he wasn't close to his grandmother, which is fine. You're not required to cry for someone's passing just because they're related. As long as he didn't cackle over her coffin he probably mourned just fine.

Do you know how his grandmother treated him? My dad didn't went to his father's funeral because, how brutally abusive he was.

I'd say this depends on his relationship with his grandma. Some grandmas are abusive people like my own grandma.

just because grandmother was blood, doesnt mean they were close or shared happy memories. I didn't shed a tear when my abusive grandmother died and won't shed a tear when my abusive mother dies either. to everyone on the outside looking in, they were both wonderful people. but if I had a regular tat artist that I was close to? yeah I'd cry too