Strong border controls are quite obviously supported by far more than 15% of the UK population (and I say that as an immigrant to the UK) - look at the Brexit vote.
Ultimately we are discussing the visible rage and despisement towards the winnning side of a national US election vote. That is incredibly concerning coming from a company as powerful as Google, and we know the same sentiment is shared across Hollywood and the mass media.
And given Trump’s anti-immigrant stance Google executives being immigrants themselves would have every right to voice their concern.
Re: approval ratings, its a moot point. Trump has enjoyed generally similar approval ratings to Obama (at most single digit percentage points lower) and ultimately won a free and fair election in a first world Republic.
Having the leaders of a global monopoly megacorporation display this kind of disdain for the elected leader of the country and everyone who supports him, and (by implication) similar populist leaders across Europe (and their supporters), is extremely, deeply, disconcerting.
And I hope you are not seriously stating that a company cannot have political views opposed to the government? It's either a democratic election (to have a legitimate government) which implies different opinions regardless of majorites or not (so that nobody can oppose the government). You cannot have it both ways.
Alt right conservatism is not a mainstream ideology anywhere in the world. Nor will it ever the way things are going.