Foreign policy is always an extension of domestic politics. No exclusion.

Trump's action was politically motivated, shallow, opportunist, reactionary, poorly thought out, incredibly irresponsible, and unbelievably dangerous.

Many will argue that the end justifies the means, and that doing the right thing even for the wrong reason is excusable and even laudable. But Trump's ends are short term political gain, and the long term global ends are potentially catastrophic. When reactionary violence is undertaken by careless people protecting or promoting their own interests, it cannot end well for anyone - least of all those on whose behalf the action was supposedly taken.