From the article:
ICE framed the new program as a countermeasure to “sanctuary cities” across the United States that acting director Matthew Albence said “undermine public safety” by adopting policies of non-cooperation with federal immigration authorities. President Trump has repeatedly blasted such jurisdictions, including San Francisco and New York City, where local authorities refuse to respect ICE requests to hold people in local jails on behalf of immigration officials.
Immigrant rights groups and law enforcement agencies in Democratic strongholds have argued that such arrangements unlawfully turn sheriff’s deputies into federal immigration agents and jails into immigrant holding cells. They say such programs are a misuse of resources that detract from larger priorities, such as the pursuit of violent criminals, while also hurting relations with local immigrant communities.
This is not right. Immigrants will not be able to call the police if there is an issue for fear of being detained for ICE. If you think that’s not a problem, then you are not thinking it all through. Real criminals cannot be dealt with if their victims cannot call the police. This is especially true as citizens have higher rates fo crime than immigrants, per the Washington Post.