Their neighbours (Saudi, UAE, Qatar, Kuwait, Iraq, Turkey and not to mention Israel) are all arming up massively over the next few years and already mostly surpass Iran's antiquated air force. Iran does pretty desperately need an effective deterrent to their superior air forces.
Not a single of this countries would even consider to fight Iran for this or that reason let alone that Iran can beat all of them despite their antiquated air force.
Enough with this, stupid, paranoid, inhibited Jewish rhetoric.
Iran needs new stuff to exert influence in central Asia and the Shia populations around.
For West this is a no no situation but West loosing track and Iran proved stubborn.
Russia is, like always, in total disarray having no clear vision about the future of the planet so moves back and forth.
China should favor Iran heavily but Chinese being clever and patient people will not do this openly until they are sure that they can take all West on directly and still prevail,
economically that is.
India is less clear where fits in, probably losing vital time focusing in an introvert, mostly useless and irrelevant, antagonism with Pakistan.
India is a superpower on the making, no reason to spend time with this backward, astray brothers, write them off is the best strategy.