The first article he posted contains next to nothing factual. It's criticizing western governments and "far-right ideology" with being in bed with each other. He's doing to rightists and vague Neo-Nazi threats the same thing everyone else does to Muslims: turns their actions into a conspiracy to commit murder. Again, I reminded of random American gunmen who reads conservative websites and has said something inflammatory online. Once they go out and shoot someone, clearly, this must be part of a grand plan, and not the actions of a disaffected loner with a grudge against the modern world.
No. It is saying we shouldn't make excuses for his beliefs (like "oh, it's just a lone madman - nothing worth bothering ourselves with") and dance around the issue just because it's "one of us" (or in the case of American media, a right-wing conservative). The author stresses the importance of this in the light of the growing far-right racist/nationalist/conservative sentiment in Europe.
You may not realise this, as you are American and it's understandable if you would not keep a close eye on this side of the sea, but fascism is on rise and a reality in Europe once again, much like it was in the years preceding WWII. We have nationalist fascists marching down the streets in Hungary, a steadily increasing xenophobia (especially anti-Romani (yet again) and Islamophobic), and I believe the countries that
doesn't have racist and/or neo-nazi parties represented in their parliaments are in the minority at this point. A recent study revealed that a quarter of the Swedish population between 18-29 thought it would be "somewhat to very good" with a "strong leader who does not have to care about democratic elections".
This may be an isolated event in it's severity, but the underlying sentiment and ideologies are not. Ignoring and pretending that these undercurrents does exist - even when they shape the political landscape and influence governments an actual people's lives - is dangerous. And that is exactly what media are doing; asserting that it can't be for political reasons simply because the man is from the Great Civilized West and we don't do such things here, once more insinuating that only the barbaric Arabs and Muslims do. Waving the whole thing away instead of dealing with (or even recognising) the parts of society that believes in these ideas and what the effects of such ideologies actually have on society. That being, in this case, a lot of innocent deaths.
There's nothing conspirational about it, just great human foolishness and pride. There is no reason to believe this man is any more a madman than any al-Qaedan or jihadist. Just a man willing to kill for his cause.