Netanyahu and his ilk need Iran. Without an external threat they can plausibly sell to domestic and foreign (that is, US) audiences, they’d be forced to deal with the real issues facing Israel, like the occupied territories, Palestinians, their own growing religious right, and all that. Far preferable to whip everyone up about a threat that they can confront with conventional military power, and even better one that the USA has had a problematic relationship with.
Iran has a leadership that has veered this way and that over the years since the revolution, but yeah, it’s basically unpleasant and has rather hostile views of Israel. Which makes it pretty much like every other government in the region. True, the Iranians have been proactive in terrorist support and involvement in various regional conflicts, but again, this is pretty much the norm for folks in and out of the region. And right now they’re actually shooting at the ISIS types, and working with the Shia in Iraq to oppose what is a far nastier bunch of people than anyone in Tehran.
Listening to Netanyahu on the radio, he’s playing the basic Israeli trump cards we all know and love. Israel is beset by enemies, Iran is an existential threat, Jews won’t go calmly to the slaughter, never again! Etc. The litany is getting old, though. Israel is by far the strongest country in the region. Iran has never, in its entire history, shown suicidal tendencies, nor has it ever demonstrated a willingness to openly attack Israel or really anyone else. Tehran has supported very bad people and done some very bad things, but, erm, so has Israel, the USA, the Saudis, Kuwait, and pretty much everyone over there and beyond.
Do I “trust” the Iranian leadership? Not really, not if by “trust” you mean do I think they will be good boy scouts and adhere to the spirit and letter of whatever agreement we can get them to sign. They will probably more or less go along with agreements, but I fully expect them to continue a clandestine capability to at least work on nuclear weapons. But the thing is, you can’t stop that. Ever. What the Israeli government now is asking for is in effect for the US to stonewall Tehran into doing something that would allow Israel to bomb them, which I’m pretty convinced would not actually have the effect of ending the nuclear threat such as it is. Then again, I’m not sure Israel really wants the Iranians to stop being a threat.
The US and Iran are getting close to the point where we might, just might, be able to start mending fences. There are those in Israel for whom that is scary as hell. In the long run, all Israel has to offer us strategically is a bad ass military, but one that we can’t really rely on to be in sync with our policies. Our cultural ties are strong, but you can see how the relationship has changed over time. It’s a much more murky calculus now, and that scares the Israelis, because for the last forty years they’ve built their entire security strategy on making everyone else in the region insecure, knowing that we’d back them up and that we sort of wanted it that way. But things are changing, and Israel’s real challenges are internal. That’s a much harder nut to crack, and there’s virtually no political hay to be made in those fields.
I think Netanyahu’s visit is really part of this floundering about, and it’s something that overall is potentially very worrisome.