in short my little bros bday was last night and we when out eating. my bro turn full vegan in 3 months so its pasta and bread diet 24. when my little cuz, 13 year old start talking about meat and who he enjoys bacon. my bro 18 just start fucking bullying him telling him hes eating dead bodys and ect.....after his long muslim conversion speech he says but everyone his own opinion, and my hole family just says everyone his own believe.wtf is going on?

i remember when i was 13 wanting to legalize weed and shit..... is he in a faze like i was?
what do i do....
btw im the biggest meat eater(no changing even if i got to eat my dog)