Aside from any bitching for and against the OP here are what I think the issues are:
1. The Iranian regime is not democratic and has a bad record on human rights. It would be better for all concerned, the Iranian people and stability in the Middle East, to see this regime removed and replaced by another one.
2. It would not be good for Iran to get nuclear weapons as it would prompt more proliferation in the region, and the greater the proliferation of nuclear weapon in unstable countries, the greater the risk of either a nuclear exchange in the region or the technology to deliver a dirty bomb nuclear attack falling in to the hands of terrorists who would use it in the West.
I think there is broad consensus around the world about these two points including probably from within Iran.
3. Iran is a security concern but it's not the most dangerous country in the region. The perma-unstable and nuclear-equipped Pakistan is a much bigger threat to security. Also the Iranian regime doesn't have the threat that Saddam posed in terms of having expansionist ideals. Iran is prickly and defensive on the international stage but it doesn't go round starting fights. The main problem from Iran is its support for pro-Iranian shia groups in other unstable countries where Iran is a destabilising force.
4. The direct threats against the West come from terrorist organisations, ISIS, Al Qaeda. Iran is generally an enemy of these groups. Iran is more of a friend of the Shia groups that fight Israel like Hezbollah so its understandable why Israel has concerns.
5. Attacking Iran is not a feasible option and would make things worse. Firstly you cannot ever sustain a ground war in Iran like in Iraq and Afghanistan, it would be 100 times more difficult. When Saddam attacked Iran in 1980 after the revolution, Iraq had a far more sophisticated military than Iran did but they met a wall of death inside Iran and had Saddam not then been bolstered by outside support the Iranians could well have counter-attacked through Iraq and overthrown him. All that outside powers could do with Iran is air strikes, but that will then drive Iran in to becoming a very hostile power against whoever attacks them and they will become a very dangerous enemy, likely operating through proxy powers.
The rest of the world has recognised this and is trying to deal with Iran by bringing them cautiously back in to the fold but with strings attached - which is limiting the risk of them developing nuclear weapons and also more likely to get them to be a constructive player in the Middle East.
The problem with Netanyahu is what the OP alluded to: he is hell bent on direct confrontation with Iran and he actively tries to oppose and disrupt efforts by the rest of teh world to contain Iran's nuclear programme. He wants to go down the path of air strikes on Iran. But this is a high stakes game which massively threatens the security of Israel which is why many Israelis are uncomfortable with it.
Israel doesn't have the capability to invade Iran, nobody does, so all Israel will do is air strike them. Iran will respond literally with the ultimate jihad on Israel and call for them to be destroyed, and that will mean the Iranians working full tilt to enable proxy groups like Hezbollah to get the technology to do it. Once we have started down that road there is literally nothing Israel can do to stop its own destruction, even if they nuke Iran, they will just make so many enemies all over the world they will focus all Islamic terrorist groups on Israel and even their relatively powerful defence and security forces will not be able to cope.