DHS -> Department of Homeland Security, parent agency of both others created after 9/11
CBP -> Customs and Border Protection, descended from U.S. Customs Service, which traces back to the end of the 18th century, but added to DHS at the beginning of the 21st
ICE -> Immigration and Customs Enforcement, created in 2003 from the criminal investigation arm of CBP and related agencies
They are related but not the same. Under the current US regime, all the stops are being pulled out and all the lines blurred. As a result, you're seeing ICE doing crowd control, BORTAC (basically CBP's tactical / SWAT unit) doing run-of-the-mill immigration enforcement, and all kinds of other wackiness. The DHS does much much more than just CBP/ICE stuff too.
alt Hacker News
DHS -> Department of Homeland Security, parent agency of both others created after 9/11
CBP -> Customs and Border Protection, descended from U.S. Customs Service, which traces back to the end of the 18th century, but added to DHS at the beginning of the 21st
ICE -> Immigration and Customs Enforcement, created in 2003 from the criminal investigation arm of CBP and related agencies
They are related but not the same. Under the current US regime, all the stops are being pulled out and all the lines blurred. As a result, you're seeing ICE doing crowd control, BORTAC (basically CBP's tactical / SWAT unit) doing run-of-the-mill immigration enforcement, and all kinds of other wackiness. The DHS does much much more than just CBP/ICE stuff too.