Ludwig never knew the difference between family and Family. He never knew that they who are surrounding him are Family with capital f - mafia. And he never knew that his brother was someone who always try to never let him touch their hellish life. 

At least until a few minutes ago, he never knew. 

Now he knows.

Now...

After his father was killed in front of his eyes.

After his brother who had been writhing on the floor was trampled and tortured by them ... replacing him.