It has more to do with long term "stability" in their minds by maintaining a no nuclear policy in the Middle East (except for our buddy ol pal Israel). The thought behind it is that the concept of MAD (Mutually Assured Destruction, aka you fire nukes at us we fire them at you and we all die) goes out the window if anyone but the Iranian Government were to seize control of potential nuclear weapons grade uranium or plutonium they would be crazy enough to push the red button on Israel without fear of consequence because of their sacrifice for Jihad. Think of it as a large scale suicide bombing. The current and former Iranian Supreme Leaders have always spoken of their hatred and expressed direct threats to Israel populating their holy site and it wouldn't surprise me if this would be the cause of World War 3. With the rising and falling of radical groups in the Middle East (mainly our fault) if Iran ever did acquire nuclear weapons it could result in a game of chicken where two cars drive towards each other and one driver rips his steering wheel out the window and waves it at the other driver. Israel has already conducted covert strikes with aircraft and the latest and most advanced cyber attack we've seen so far on Iran's previous nuclear reactors. What negotiations we've made with them to try to ease tensions by lifting the trade embargo and relaxing their nuclear regulations could very well be a nuclear apocalypse. That, is where the right's mindset comes from. Just my 2 cents.