Maybe the Governor resents Trump's promise to de-fund sanctuary cities, but the people who voted for him need him to stand up for their right to live in the Commonwealth. Republicans are indeed a minority in Massachusetts, but don't seem to receive the special status and protections awarded to other minority groups.
If this message were directed towards any other minority group in Boston's diverse population, there would marches, speeches and candlelight vigils against the hate and intolerance:
Boston Graffiti Urges Death on Trump Supporters