“State or local officials have no lawful authority to arrest federal agents from officially and faithfully enforcing federal law even using state law as a reason.”
Yes they do:
Title 18, U.S.C., Section 241
Conspiracy Against Rights
“This statute makes it unlawful for two or more persons to conspire to injure, oppress, threaten, or intimidate any person of any state, territory or district in the free exercise or enjoyment of any right or privilege secured to him/her by the Constitution or the laws of the United States, (or because of his/her having exercised the same).”
By the logic of your argument the Federal government could pass a law allowing Federal agents to enter the homes of citizens without a warrant, slaughter everyone inside, loot their personal property, and local law enforcement would be powerless to stop it. The Constitution through nullification grants the states the ultimate authority to keep the Federal government in check against such outrageous acts/laws. And that’s regardless of what federal courts have to say on such outrageous and unconstitutional laws, since they’re really just a branch of the federal government. So what is the federal courts function then? Their only choice is to strike down unconstitutional laws, or be subject to nullification.
If federal agents violated 18 U.S.C. 241 then other federal agents would arrest them. Also, the federal courts would strike down any federal law that would blatantly and outrageously deprive people of their rights.