Or just because they tried to assassinate Trump.
https://www.politico.com/news/2024/11/08/donald-trump-iran-a...
Ted Cruz can blather whatever he wants (and he also footnoted it to say it was only HIS belief), but only Iran has holy-text justification for the destruction of all Jews, mentioned numerous times in authenticated Hadiths (just search them for "The last hour will not come")