SIMON He could not quickly change himself from a Jewish nationalist to a spiritually minded internationalist. Four years wasn't enough time to teach him. However, Jesus was always patient with him.
JUDAS ISCARIOT Judas was apart of the "Kiss of Judas". The Kiss of Judas was when Judas betrayed Jesus for a bribe known as "thirty pieces of silver". He identified the person with a kiss.
Matthias Death He was beaten, his stomach was torn out and set afire. His eyes were gouged and was forced to drink poison. He then died by being stoned. Even though he was already dead, they beheaded him.