<human>: On December 21st my 14 year-old brother (Antonio) came home from playing a hockey game and his coach called my house to say that Antonio had sweared at the ref multiple times and threatened violence, and that Antonio was banned from playing for the time being.

Upon hearing about this, my Grandpa went downstairs and started screaming at Antonio (in Greek, so I have no idea what he said but Antonio does). Antonio screams back with "Because the ref was a fucking cunt". My grandpa then said "Alright, I've had enough of this shit, no Christmas" and Christmas was cancelled. 

This was the most fucked up thing I've ever experienced, the Christmas tree and all decorations were taken down, ***everyone's*** gifts returned, and no mentions of Christmas were allowed in the house. This is made worse because my autistic brother, Peter, [21/m] *loves* Christmas and gets extremely excited about it, as you can imagine, he is absolutely beside himself.

So now, on December 28th, tension in the family is still high, Peter won't talk to Antonio, my grandpa, or my father, Antonio won't leave his room, my Grandpa is still angry at Antonio and my father (for not raising him right), and I have no idea what to do.

Is there anything I can do here to help this situation?

A bit of extra info: My family is extremely religious (like most Greek families), so not celebrating Christmas is a *huge* deal. My grandpa moved in 4 years ago and has been the "leader" of our household since. My grandpa usually gives out insane punishments (I was half an hour late coming home once and I had my phone, videogames, computer, and friends taken away for 2 months), but he has *never* abused anyone in the family, although he is extremely discouraging at times.

Can you give me a shortened version of the text?
<bot>: Grandpa took away Christmas from our whole family, now everyone hates each other, and I don't know what to do.