Biden can stop it today if he wants, either by withholding weapons or by direct intervention (although an embargo would probably suffice). But the fact that the US is STILL sending weapons is nothing less than direct complicity. People have been shot for less during the Nuremberg Trials.
I think western journalists are committing a grave mistake by assuming the desensitization to journalist killings will be isolated to Gaza. At a certain point you can’t put the toothpaste back in the tube.