Support is definitely down, but even on the Gaza conflict where Israel has been generally accepted to have met the criteria for a genocide only 31% of Americans say they've gone too far as of Oct 1.  Importantly US political leadership is steadfast in their commitment to Israel.
https://www.pewresearch.org/short-reads/2024/10/01/slight-uptick-in-americans-wanting-u-s-to-help-diplomatically-resolve-israel-hamas-war/