Not true.. If a States law "respects an establishment of religion", -- or contradicts any other provision of the Law of the Land, -- it can be found unconstitutional under Article VI.
No, the Federal government is forbidden to get involved. THAT is the law of the land.
"Congress shall make no law" does not mean the "-- Federal government is forbidden to get involved. --" THAT is ~not~ the law of the land, it's what you imagine it to be.
You can't break a law to enforce it.
Obviously not. No one here is saying you can.
What part of "Congress shall make no law RESPECTING" don't you understand? Congress can't get involved, and by extention, neither can our tyrannical Federal Courts.