WSWS has a skewed view of history that is outside of what mainstream historians would accept. For that reason displaying them for neutral historical search queries is dishonest. So it seems reasonable that whatever version of search algorithm they updated to might assign them a lower priority.

>It is also an objective fact that Google has close relations to the state (top federal campaign contributor, regular visitor to the White House, Eric Schmidt book praised by Michael Hayden, etc.)

So? Doesn't mean regulatory bodies are interfering in day-to-day operational decision or in this specific instance.

>So it is a "conspiracy theory" that Google's actions might be motivated by political considerations?

Anything is possible but there's no evidence - so yes, it is a "conspiracy theory", especially considering there's an alternative explanation that is more reasonable and doesn't necessitate invoking sinister shadow governmental actions.