The Paragon is supposed to be hated by all.
During the Primordial Era, the number of people who were kind to him didn't exceed 20. Many hated him just for being himself; he was the Paragon. That hatred continued in the second incarnation and subsequent incarnations.
So, because of that, he takes care of those who don't hate him. He holds them close, and so when their lives are threatened, he goes berserk.
Sure, the universe is watching.
He may have even made everyone start to side with him after nine eras.
While that is good and may have given him a reputation he would love to have after being hated for so long, he wouldn't mind going back to being hated and hunted down by everyone if it meant he could protect his family and loved ones.
Lily was hurt by Drakhar, and that was all it took for Klaus to shed all forms of hesitation he may have developed in this lifetime.
