A couple of points deserve to be made here:
1) The shooter self-described as being both left-wing and embracing National Socialism. He viewed National Socialism as being more to the "right" than his earlier communist stance but still saw National Socialism as being left-wing.
2) Here's what Wikipedia says about the creation of the moniker National Socialism:
Nazism - Wikipedia
The term "National Socialism" arose out of attempts to create a nationalist redefinition of socialism, as an alternative to both Marxist international socialism and free-market capitalism. Nazism rejected the Marxist concepts of class conflict and universal equality, opposed cosmopolitan internationalism, and sought to convince all parts of the new German society to subordinate their personal interests to the "common good", accepting political interests as the main priority of economic organisation, which tended to match the general outlook of collectivism or communitarianism rather than economic socialism.
Even Wikipedia recognizes the socialist origins of National Socialism.
It seems to me that most people see themselves and their beliefs as with the "good guys". That's usually true regardless of how evil their own individual actions actually are. The ends justifies the means, don't ya know.
Thanks for making my point, yet again.
Powerful government inevitably leads to horrendous abuses. The pattern has been consistently repeated throughout history. Powerful government often cares little about individuals and more about certain goals which must be met, regardless of the cost.
Less powerful government and individual freedom is the way. The catch is that without a powerful government to police every detail of people's lives, the people must have the moral character to recognize the inalienable rights others have and to uphold a civilized and just society. It's not really very complicated, but it's not really all that easy either.