I’ve seen others saying it’s just a way to make his devoted loyalists think he’s actually doing something.

Probably a bit of both I’d imagine.

Classic authoritarian tactics:

Target a marginalized group with an issue that you've framed as ridiculous or politically suicidal to disagree with, get public opinion riled up by manipulating their grievances through exploiting their internal prejudices, and make everything an extension of preserving national security. Once you've manipulated enough people into giving you extralegal power, simply expand the circle of 'national security threats'.

In just a few months we've watched Trump:

steal the power of the purse and the power to enact tariffs from Congress,

create a precedent for the unconstitutional arrest, detainment, and removal of legal residents and dissenting citizens,

iterate his intentions to restart American expansionism into Canada and Greenland,

Successfully twist the arm of media companies, law firms, and universities into doing his bidding,

And his other executive order directs Dept. Of Homeland Security, DoJ, and DoD to create a plan for implementation of military and national security assets to "prevent crime and protect public safety".

Welcome to the 'find out' stage.