Only if you're willing to say that pagan imagery, promotion of Islam, secularist anti-values, and the rest foisted on innocent children in the name of 'diversity' or 'environmentalism' must also be removed. If they aren't, then he shouldn't be going anywhere, either. Ideally, the government schools would teach a 'values-neutral' curriculum reflecting the sort of Protestant ethic known in the time of the founders, with added tolerance for Catholicism, even Islam, and assorted unpopular denominations that may no longer even exist. But they would teach strictly the three r's. Teachers bored by simply that, who preferred more, would indeed be fired. But we're SO FAR from anything close to that, where Islam is even actively taught to impressionable kids AFTER 9/11 in these same schools, that not only should you say he should NOT be fired, but that they desperately need to hire many more of the same! Such are the times.
Both Islam and Christianity, along with the other religions should be taught in schools. Just not in the math classes. And students should be free from the attacks of zealots as the go from class to class.