How can Trump stop the killings in Iran?

The killings in the streets of Iranian cities are continuing. More than 500 protesters shot dead by security forces aiming to kill. It's a shocking scene which we have witnessed many times over the years. This is dictatorship repression on an alarming scale. What can Donald Trump do to stop it? He has promised to intervene. But what would be the point of just bombing Iranian military sites? That would just kill more people, albeit not innocent civilians in the streets. What it would do is provoke Iran to retaliate by sending missiles against American troops in the Middle East. War, war, more war. Now the ayatollahs have offered to negotiate with Washington. I don't know what that means. How can you negotiate about killing people who are protesting about the loathsome regime which is ruining their lives? Certainly, there is nothing that Trump can give them in return for stopping the daily murders. That won't solve anything. It's a dilemma for Trump and his national security team. But right now, what happens next in Iran is more important than the future of Greenland, Cuba, Colombia, Venezuela etc. Perhaps the only solution is for the ayatollahs and Trump to get together and bash out a no-nukes guarantee and dismantling of all uranium-enrichment plants (what's left after last June's US and Israeli bombing) in return for a partial lifting of sanctions So then the economy of the country can improve, and thus stop the reason for the protests. That would be something worth negotiating. PLEASE BUY AGENT REDRUTH, MY NEW SPY THRILLER. AMAZON, WATERSTONES ETC.