And I really dislike the alleged perpetrator being called a right-wing Christian. Right-wing, fine. But no one who kills other people in this fashion is Christian. No one who spouts hate and fear mongering is Christian.
In Matthew 22:36-40, the Bible says:
36 “Teacher, which is the greatest commandment in the Law?”
37 Jesus replied: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’[a] 38 This is the first and greatest commandment. 39 And the second is like it: ‘Love your neighbor as yourself.’[b] 40 All the Law and the Prophets hang on these two commandments.”
If we could REALLY do the first, the second, and all other commandments would naturally follow.
And in case you wondered, yes, it makes me sad when there is killing anywhere. Unfortunately, there are some parts of the world where it's not a surprise or a shock when it occurs. Norway is the last place one expects it so it is jarring.