The president has always been allowed to assassinate you… They’re in charge of the CIA/FBI/NSA/IRS/Other scary 3 letters who assassinate people all the time.

Making presidents immune in official actions was never a good idea given the sheer number of decisions they have to make and the scrutiny they’re under means they’re sure to break laws sometimes, plus the subjectivity of some laws (eg is making bad decisions and crashing the econony treason?) however in unofficial actions they should absolutely not be immune.