I think Mercedes have protected Lewis by taking the lions share of the blame. At the end of the day, if he wasn't fretting about his tyres, he wouldn't have pitted. End of story, Monaco GP victory. Would have been simple enough, "I can get to the end of the race on these tyres".
Racing car teams really don't give a crap about the nationality of their drivers. Fans might, but Mercedes will just want to win world titles, hence Hamilton's new contract.
Hamilton puts a lot of pressure on his team/engineer during a race. He's either barking at them for talking to him too...