Obviously we're not talking about getting rid of FAA or FEMA, but rather breaking up DHS back how it was before and getting rid of ICE. TSA doesn't do jack squat and is almost entirely security theater; it needs to go.
And FEMA is now so ridiculously politicized maybe it does need a rebuild, when you have leadership debating whether aid is deserved or granted based on whether a county or state voted for the malignant narcissist in charge.
Yeah bring back INS, but also disqualify anyone employed by the current DoJ or DHS from holding civil service employment in the future. Hopefully they'll be facing prison or even more severe criminal penalties for their conspiracy against rights.