The 'separation' issue has been and always will be that the state shall not mandate a specific religion. NOT to isolate from Christianity / God.
Anytime you're confused as to what the Constitution or Bill of Rights actually 'says', get yourself a plain old dictionary and look up each word. You will be rewarded with clarity and insight as to what the old boys meant when they wrote the documents.
Like this:
The second amendment reads: “A well regulated militia, being necessary to the security of a free state , the right of the people to keep and bear arms, shall not be infringed.”
Definitions of the above words are from the typical American standard dictionary, for the anti-rights liberal elite who prefer to twist things to their own ends:
Regulated: To control or direct according to rule, principle, or law.
Militia: An army composed of ordinary citizens rather than professional soldiers.
A military force that is not part of a regular army and is subject to call for service in an emergency. The whole body of physically fit civilians eligible by law for military service.
Necessary: Absolutely essential; Needed to achieve a certain result or effect; Required by obligation, compulsion, or convention; Something indispensable.
Security: Something that gives or assures safety, as A group or department of private guards. Measures adopted, as by a business or homeowner, to prevent a crime such as burglary or assault: Freedom from risk or danger; safety.
Free: Not imprisoned or enslaved; being at liberty; Not controlled by obligation or the will of another; Not subject to arbitrary interference by a government.
State: A specific mode of government; A body politic, especially one constituting a nation.
Right: Fitting, proper, or appropriate; Most favorable, desirable, or convenient; Conforming with or conformable to justice, law, or morality; A just or legal claim or title; According to law, morality, or justice.
People: A body of persons living in the same country under one national government; a nationality; The mass of ordinary persons; the populace; The citizens of a political unit, such as a nation or state; the electorate; A body of persons living in the same country under one national government; a nationality.
Keep: To retain possession of: To have as a supply; To maintain for use or service; To manage, tend, or have charge of.
Bear: To carry from one place to another; transport; To be accountable for; assume; To have a tolerance for.
Arms: A weapon, especially a firearm; To equip with weapons; To provide with something that strengthens or protects.
Shall: Used before a verb in the infinitive to show something, such as an order, promise, requirement, or obligation.
Not: In no way; to no degree. Used to express negation, denial, refusal, or prohibition.
Infringed: To transgress or exceed the limits of; violate; Obsolete To defeat; invalidate. To encroach on someone or something; engage in trespassing. Latin nfringere, to destroy.