Moved from @pingveno
My understanding is this lie was used by Hamas to isolate Israel from Arab nations where much of the public was frankly horrified by the brutal violence Hamas had aimed specifically at civilians. So no, it wasn’t just “the one relatively inconsequential thing,” it is a lie that has had serious consequences.
When he’s being actively undermined by Republicans the whole way, just cleaning up Trump’s mess can be an accomplishment. The Inflation Reduction Act went against heavily entrenched interests to restart the US federal government’s response to climate change. It took real finesse to get that through Congress.