It really depends on your personal opinion.
Technically, Arthas became the Lich King, and currently people can fight the Lich King in Ice Crown Citadel, he is the final boss in this raid.
NO!!!! you can't Frostmourne stay's with arthas permanently
No, Uther was the first Paladin. He was also a mentor to Arthas. Arthas's father was King Terenas Menethil II.
king terenas who was slain by arthas himself
We All Deserve to Die was created on 2010-04-18.
He didn't die for anything, he was just "unexpectedly" shot.
Frostmourne
we all deserve to die = wir verdienen alle zu sterben
Yes, Arthas Menethil is the Lich King. You can see a cinematic of the Lich Ling by clicking on the plinth of the fountain in Dalaran.
Jaina and Arthas were in a relationship for a while as well as being life long friends since childhood.
Most everybody that exists on this earth doesn't deserve to die. But we all don't live forever either.
Short Answer: NO Less Short Answer: Every single scourge creature can be considered a child of arthas.