That position requires a willful ignorance of the difference between a religious symbol and a religious practice.
Do you really think it's a coincidence that the law carves out a specific prohibition on religious practices that doesn't affect Christians, the dominant religious group? Your flag has a cross on it.
Conservatism consists of exactly one proposition …There must be in-groups whom the law protects but does not bind, alongside out-groups whom the law binds but does not protect.