ICE and DHS were both consolidated in the wake of the Sept. 11 attacks. The functions they perform existed before, it was just a re-org whose goal was improved information sharing.
The most common variant of the "abolish DHS" opinion simply holds that this re-org was unsuccessful and should be reverted.
The most common variant of the "abolish DHS" opinion simply holds that this re-org was unsuccessful and should be reverted.