Can Iran ever be trusted to keep their word?

Iran has a reputation for being devious, and for that reason it is highly unlikely that any deal Donald Trump might fix with Tehran will actually hold water. Obama did a nukes deal with Iran in 2015 but it was never strong enough to stop Iran from secretly continuing its ambition to build a bomb, even if the programme had to be curtailed under the restrictions imposed by the treaty that was signed. In other words, Iran under its present regime can never be trusted. I feel sorriest for the Iranian people who have had to put up with this regime ever since the revolution in 1979. So, is this the right time for the US to take action that might in the end lead to regime-change? The answer is not simple. If regime-change can only be brought about by war, that won't help the Iranian people who will suffer even more. Many will be killed. It might sound the only solution but violence cannot be the answer. The trouble is, the tens of thousands who bravely protested in the streets against the regime, were brutally repressed. Thousands were killed by the so-called security authorities, many of them moving around on motorbikes, opening fire at random. Now there are even reports of wounded protesters in hosptals being shot in the head as they lie in their beds. A war between Iran and the US and probably Israel, will lead to more and more violence against the poor Iranian people. War or no war, they will always be the victims.