Summary
Former CIA Director Leon Panetta warned that Trump’s return to the White House could embolden Israeli Prime Minister Benjamin Netanyahu, giving him a “blank check” in the Middle East and increasing the risk of war with Iran.
Panetta expressed concern that Trump would support Netanyahu’s aggressive stance against Iran without restraint, potentially worsening regional instability.
Panetta also predicted Trump might allow Russia to retain parts of Ukraine if he returns to office, though he doubted Trump’s negotiation skills.
He criticized Trump’s approach to foreign policy, suggesting Trump would be inclined to “capitulate” to authoritarian leaders, which may not sit well with some Republicans.
It is not the only reason. In swing states like Michigan it seems to have been the deciding factor.
https://www.newsweek.com/jill-stein-wins-22-vote-dearborn-gaza-stings-harris-network-1979861
However i doubt that even with a decent campaign of addressing the economic concerns of normal people the Democrats could have hacked it. With the steadfast support for Israel they have shown everyone whose ancestry is somewhere south of the European alps, that they are second grade people, easily dispensable if necessary.