1) Who is oppressing Christmas?
2) Being gay and serving in the military is an expression of individual freedom. Being Christian and forcing an entire public school to take time out of education (the primary purpose of a school) so that some kids can pray, is a restriction of individual freedom.
The first is an act that the Constitution of this country allows for, and was specifically designed to preserve: the freedom from religious/governmental oppression.
The second is an act of religious/governmental oppression, or: tyranny, which is specifically what the Constitution was trying to destroy.
Therefore, the first act is in-line with traditional American values, and the second is an attack on traditional American values.
Let me dumb it down some more: Rick Perry, and anyone else who supports government policy that sides with religious oppression masquerading as “religious freedom” is a tyrant, an enemy to American values, and, if I may, anti-American.