After today's SCOTUS ruling, could Biden order the Sercret Service to execute Donald Trump as an "official act of office" and receive immunity from prosecution?

My understanding is that the SCOTUS has just determined that any “official act” done by a president would be immune from prosecution. Under this logic, Biden could use his judgement to protect the constitution from someone who claims to want to be dictator for a day by employing the executive power to permanently remove the threat.

The far right SCOTUS ruling would protect such an act, wouldn’t it?

Hell, couldn’t he use this newfound protection to order the execution of any SCOTUS Justice he didn’t like?