Just try googling site:news.ycombinator.com google
From the first page I see:
6 discussions that are basically neutral
1 positive (Google puts Japan quake tsunami warning on their search page)
1 mix of positive and negative (people arguing both positions) (Goodbye, Google App Engine)
2 negative (Google: Bing Is Cheating, Copying Our Search Results, Google to announce "new programming language for structured web programming" )
I've never noticed a leaning towards favoring Google here. If you were arguing that YC funded companies get preferential treatment then you might have a case but I don't think your "I get a feeling that the hivemind of HN is critical of anything that is not associated google" is correct at all.
I'm kind of surprised NoScript doesn't have an option of disabling scripts on a site-by-site basis. Ergo, if I have two tabs open, Google+ and some other page containing a Google+ Like button, I should be able to enable Google scripts on only the Google+ page. As it stands, when a script from a domain is enabled, it is enabled for any and all tabs you have open. I think that behavior can be improved.
In the meantime, you can use the RequestPolicy add-on in order to block cross-domain requests to G+ in your other tabs. In this case, NoScript won't even be needed because the script won't be loaded at all.
So while there may be an element of opportunism in covert anti-FB PR, it's working with dry kindling. There's real fire here, not just smoke.