1. You have all the individual rights available to Soldiers. You are a Soldier, and being commander does not forfeit those rights.
A) As such you do not need to pretend that you have no particular beliefs or persuasions regarding what is true and false.
B) You are not required to remain silent about your beliefs.
C) BUT... UCMJ Art. 88 forbids commissioned officers from using "contemptuous words against the President, the Vice President, Congress, the Secretary of Defense, the Secretary of a military department, the Secretary of Transportation, or the Governor or legislature of any State, Territory, Commonwealth, or possession in which he is on duty or present." This applies to retired officers as well, although no retired officer has successfully charged. SCOTUS case Parker vs Levy (1974) upheld the constitutionality of this article against free speech rights. Contemptuous being interpretable my advice is that while you are free to voice opposition, do so in a professional manner in accordance with 1 Peter 2:17.
D) You cannot by virtue of your position favor one faith over another. You can espouse a personal belief, but not while representing the US or US Army, meaning the command itself cannot be partial (Joint
2. A Commander not only has the right, but the duty to care for the Spiritual Health of all Soldiers. This means that scheduling religious events, inviting speakers, and otherwise encouraging religious activity is within a commander's purview ().
3. You may spend operational funds to support religious/spiritual events. "b. Commanders at all levels will allocate appropriated resources to support constitutional, statutory, mission-essential, and mission enhancing essential elements of religious services, consistent with law and policy. c. Funding for religious support to authorized individuals must be funded from operation and maintenance, Army funds including operational tempo funds." (AR 165-1 chapter 14-1)