It seems most obvious that the people in this 'Group of Ignorance' either can't or won't read. There is absolutely no mention in the US Constitution of even the concept of "Separation of Church and State". This group may wish it were in the document; but, it isn't.
There is a big difference between "unconstitutional" and "non-constitutional". The following is almost a remedial redundancy: Anything not specifically delineated in the US Constitution is "non-constitutional". Examples: what types of light bulbs to use, the amount of water pressure one may have in their homes, etc. Therefore, any laws passed dealing with such are "unconstitutional" as is explained below.
People, States, and the Federal Government can and do, on occasion, commit actions which are clearly "unconstitutional". For example, laws and/or "policies" specifying "Civil Asset Forfeiture" are clear and blatant violations of both the 4th & 5th Amendments. The Federal Government has somewhat backed away from this onerous undertaking. However, some States view such as a revenue source. Just for grins, read the 4th & 5th Amendments then do a Google search on "Civil Asset Forfeiture Tennessee" and compare what you find against those 2 Amendments.
Any time Congress passes and the President signs into law a bill advocating anything outside that specifically stated in Article 1, Section 8 of our Constitution, the Government has entered into "unconstitutional" territory. Almost every executive action/order issued by a president due to the inability or lack of desirability of Congress to so something, whatever that may be, is "unconstitutional". Under the US Constitution only Congress may create law; the president's job in this regard is only to enforce the law - not make law.
There is an interesting article on what's not in the Constitution offered by 'usconstituion.net'. It is interesting, informative, and worth the look-see.