We support them but they don’t need us. Iran would crumble tomorrow without China. Also, Likud Israel might be gone after this year’s October election, whether we want it gone or not. Conversely, China acts as a virtual suzerain over Iran (and NK).
US is also best friends with the financiers of the horrific genocide in Sudan.
This isn't whataboutism because you're genuinely presenting it as if it's something very different from what the US has been up to for the last 60 years.