Personally, after having watched Rs put up fake Dem candidates in my state and pull the same games with candidate names in other states, it's hard to get too upset about this. Either make it illegal, make a bilateral pact of de-escalation and stop doing it, or quit whining.
Beyond that, what law was broken? This has been litigated in Alaska (elections are still the province of the states, not Trump) and found legal. This is a conservative biased NYT hit piece, trying to gin up an October Surprise Scandal.
As far as Trump deciding to tip over the election chess board and eat a bishop, if it doesn't go his way, he'll do anything. Democrats aren't morally responsible for Trump, Trump has agency of his own. Trump can do the adult, ethical, legal thing and let Alaska run its own elections. If he does otherwise, that's totally on him.