For example, the president can deem opposition party leaders to be terrorists and then in an official capacity order them to be assassinated by the SEALs. He can grant blanket pardons to everyone involved while he himself enjoys absolute immunity for his official acts.

The Senate will never be able to impeach or convict you when you’ve killed off those who would do it.

This ruling makes the president a temporary dictator, and it’s reeeeeally easy to go from a temporary dictator to a lifetime one.

why is it so easy to just deem some group of people terrorists, without any evidence presented?

And if this is true, why can't biden do it today, and preempt trump from doing it?

And Democratic party are known to not want to rock the boat, so to speak.