If you meant, Why is he mean, then, he isn't.
He has a strong relationship-friendship with Lennie, and looks out for him. He's only 'mean' towards him because Lennie's stupidness annoys him.
Also, if you're talking about when George killed Lennie, he did it because Curley was going too 'shoot him in the gut', which would mean that Lennie would survive, and be in horrible pain.
George asked Lennie to look out across to the mountains, whilst he explained the Ranch they were previously dreaming of buying. He shot Lennie cleany in the back if the head, letting Lennie die in a peaceful and happy way.
He wasn't intently mean.
George is portrayed as mean in "Of Mice and Men" because he is often exasperated by Lennie's actions and feels burdened by the responsibility of taking care of him. His frustration and short-temper stem from the challenges of looking after someone who is mentally challenged, while also trying to achieve their shared dream of owning their own land. Additionally, George's tough exterior can be seen as a defense mechanism to hide his vulnerability and fear of being alone.
George emphasizes 'manners' as a central quality for judging people because of the way he's being treated by other people.
Lennie Small and George Milton
George.
George
Gary Sinise portrayed the character of George in the 1992 film adaptation of "Of Mice and Men."
The only drink George mentions in "Of Mice and Men" by John Steinbeck is whiskey.
Lenny and George
Auburn
George Milton is described as being in his early 30s in John Steinbeck's novel "Of Mice and Men."
Yes
lennie and George are friends
His gun
Solitaire