Regardless whether you support the Palestinians or not, you really have to be deliberately blind not to understand why they fight. Even the most diehard right wing Zionist will admit, if he is honest, that if things were reversed he would be a terrorist against them. There is no equivalence whatsoever between Palestinian terrorism, which any person who is honest can understand (whether or not they support it), and this irrational act in Oslo which was done by someone whose mind is a bit muddied. Applies to your comment #8 as well.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: Norway massacre suspect warns of two more terrorist cells