We can reasonably count the amount of time since Biden approved the transfer of billions of dollars worth of jets and weapons to Israel in hours.
This was always going to be a genocide - it didn’t take the weight US security apparatus to know this, but the US’s active defence of Israel from supplying the weapons being used to carry out that genocide, to vetoing various UN security council resolutions relating to the genocide, to taking inadequate action too late, Biden and the US government broadly have actively aided this genocide.