@hawkeye10,
You say a lot of things, but you sound like someone who relies on Fox News for their information.
Are conservative Iranian politicians against the deal? Of course they are, just like their counterparts in America.
The Death to America rhetoric is just that, and Khamenei's quotation is more about reassuring the population that they have not surrendered to the Americans.
Iranian and American conservatives both say the deal is bad for their respective countries, but it's really just bad for reactionaries of any nationality.