It simple actually, Iran has no impact on my life where Israel has a very negative impact on my life. I barely want to remain in the tech industry because all of the VCs are pro-genocide. My tax dollars, military and political capital all go to cover Israel. I do not think Israel should have ever been created. It does not benefit me, only harms and endangers.
A broader perspective might suggest that in order to continue your life without adverse impacts, it is in your interest that Iran be prevented from developing nuclear weapons. Israel is doing a lot of work on your behalf in retarding that outcome.
So, even if you are not sympathetic to the plight of our ideological fellow travelers, from a purely utilitarian view, it is in your interest to support Israel.
You support Iran having nuclear weapons in order to keep Israel in check? You're delusional if you think you'd like a world with the people running Iran in charge.
MAD is a well established doctrine for deterrence. The people running Iran are running Iran, not the world. The people running Israel however have undue influence on my and many other countries.
All humans have a will to live, Hamas is fighting against occupation not to commit suicide. The Israeli theocracy however seems to have lost control of all logic and instead is operating in the death throws of an apartheid state coming to its end. The world would be safer with more opposition to Israel.
