No, it couldn't.
Wicca is officially recognized by the government of the United States of America.
The US government doesn't "recognize" religions.
By the way, Judaism predates Christianity by thousands of years, but I don't see any reports of Jews distraught over crosses on gravestones.
One factor in their nonchalance might be that Christians don't fraudulently claim that Christianity actually predates Judaism.
Would you deny Wiccans their commonly accepted religious symbol on their gravestones?
Would you read my posts on this thread and acknowledge that I already answered this question?
Yes, it does. That's how a religion receives tax exempt status. The religion must be recognized by the government.
What is your issue with when Wicca began? Would you feel better if it was simply called Paganism? For that absolutely does predate Christianity, and Wicca is a denomination thereof. Unless you're Catholic, your denomination didn't begin in 30AD. You plan on holding that against Protestants?
If you don't have an issue with what symbol they use, why don't you honor the sacrifice of the soldier, get off your timeline soapbox, and go on with your life? You are dishonoring these soldiers with your petty argument.