The Go Language.
Can you put your grinding axe away and stick entirely to facts and technical merits?
Note that Go ended up being a major language within Google for a wide range of systems (even replacing systems built previously by the Go developers, such as sawzall), so rather than saying "debatable loyalty to google", might it not be better to say that the developers worked to transform Google from the inside to be less dependent on C++ and Java?
That right there is evidence they don't have Google's best interests at heart.