??
What exactly do you disagree with? Most immigration violations are a civil matter (USC section 8). There are criminal violations like human trafficking or illegal entry. But if you came into the US with a visa and then overstayed, you're not committing anything criminal.
And even illegal entry is a misdemeanor, the maximum punishment is at most 6 months in jail. So yeah, ICE and DHS _technically_ don't have more power than regular marshals for most immigration cases.
Which should scare you, btw. There are plenty of civil violations that can be similarly weaponized in future.