Consequences of acting in Donald Trump's usual egocentric, "I make the rules," way can be quite dangerous for all of us.

Specifically in reference to Iran, Donald Trump will not be able to renegotiate the nuclear arms pact. His attempt to do so will alienate all the European powers involved and will cost a number of US companies some very lucrative contracts. It is a losing proposition for him and for the US. Much more so than for Iran, who will turn more and more to Russia and China as trading partners.

Trump often acts in delusional ways. I think he is a man who has always made his own rules and gotten away with it. Enough money will do that for you. However, he has also gotten away with it because he has operated in limited contexts - mostly in the realm of business.

If the Americans do move the embassy to Jerusalem, and eventually the rest of the world follows suit, it will mark the end of Palestinian hopes for a two-state solution.

If Trump takes an aggressive anti-Iranian stand, I suspect it will complicate his relations with Russia; how much so, depends on what else Trump does, particularly about participation in NATO.

With the exception of Obama's belated lame-duck behavior, the US has always, in practice, supported Israel unquestionably.

Trump might well choose to renege on US obligations (so much for the sanctity of contracts!) and no doubt he would have the agreement of Zionist politicians like Schumer. But the consequences will be the increased isolation of the US - particularly from Europe, whose businesses will just move into Iran while US companies will lose out.