"Like I told McDonald's, this isn't mere arm-folding going on in those sanctuary cities. Sanctuary from federal law is a crime. Obstruction is a crime. Nullification is a crime. Registering criminals as citizens for the sole purpose of creating congressional seats is a crime."
Arm folding is the sanctuary city status. It's saying "I won't cooperate with you." If ICE comes back with a warrant for arrest, they can arrest them. Detainers are not warrants. They don't carry probable cause. ICE seems to think they do but that's not standing case law.
https://www.justice.gov/ag/us-sanctuary-jurisdiction-list-following-executive-order-14287-protecting-american-communities?utm_medium=email&utm_source=govdelivery
There's no one definition of a sanctuary city but the above link takes you to where the Trump DOJ defines it. There are nine characteristics they list. None of them prevent an ICE agent, with a warrant, arresting someone they think is an undocumented migrant anywhere in the country. There's nebulous talk of "jailhouse restrictions" - but this falls into 2 categories - you need prior authorization from a sheriff to enter the prison, or you need a criminal warrant. see: https://www.albanylaw.edu/government-law-center/sanctuary-jurisdictions
There might be a case for not sharing certain communications with ICE being in violation of the law - but this is also not a given on the same grounds: the federal government cannot "commandeer" local and state officers to enforce federal law, and collecting and transmitting data to ICE could be enforcement. There could be grounds for conditioning funding for not sharing communications (this seems to be the conclusion of the 2nd circuit), but this is not the same as being "illegal." see: https://tracreports.org/tracker/dynadata/2020_05/LSB10386.pdf
The only other characteristic the DOJ lists that pertains to obstruction is this one:
Laws, Ordinances, Executive Directives: Cities, states, or counties that have laws, ordinances, regulations, resolutions, policies, or other formalized practices that obstruct or limit local law enforcement cooperation with U.S. Immigration and Customs Enforcement (ICE).
Seems redundant and nebulous. Also, the DOJ doesn't disaggregate and say which characteristics apply to which jurisdictions. On the other hand, ICE does: https://www.ice.gov/doclib/ddor/ddor2017_02-11to02-17.pdf.
Their main focus seems to be detainers.
"It's even worse than the 3/5 compromise hack for congressional power, since at least that was voted on. Nobody voted to count criminal non-citizens in the census."
3/5 compromise was voted on by the convention. Don't think the people had a say on that one. Same with the census clause which is actually a sentence away from the 3/5 compromise:
Representatives and direct Taxes shall be apportioned among the several States which may be included within this Union, according to their respective Numbers, which shall be determined by adding to the whole Number of free Persons.
Note it says "free persons" and not "US citizens." The word "citizen" is used elsewhere in the document, so one imagines this was deliberate. It would probably require an amendment to change that.
Census law was also passed in 1954 which established the Census bureau so if the people then voted for their Senators and House members - they did vote for it.
But yeah are you reading Black Reconstruction? by DuBois? It's a good book. Super long. Read up to and including the general strike.