Nuclear Rights and Redlines

Iran does have have enemies mostly the U.S. and Israel, which they could use to their benefits which can become a concern. Iran should have the right to nuclear technology but it can be nervous to people because you never know what their next moved could turn out to be. Many other countries have nuclear weapons so why shouldn't Iran but they should only use if necessary like in war, but otherwise Iran would have to follow the regulations and if they don't agree then action need to be taken. We have used nuclear weapons against other countries so why shouldn't they get to. As for red line for me would be if they were developing to go after undefeated nations. It would be scary if all countries had nuclear weapons because you would have to watch over your shoulder all the time. It would just be easier if there were no nuclear weapons in the would and just have all countries keep an eye on each other. Also it would be okay if Iran uses it nuclear as for power but if they made a direct threat against Israel or the U.S. then take action.