He must consciously on his own responsibility take the political decision to overrule due party process and actively withdraw the whip.
Starmers champion Paul Mason said that reinstatement was a "good outcome" But Starmer himself said it was an anti-Jewish outcome.
Guardian and BBC journalists have not read the EHRC report. It is in defiance of that report that Starmr must be willing to flout party process, on the ostensible grounds that the "Jewish Community" is not happy with that process.
If he does not do so the MSM will paint him as weak.