Of course that's wrong.
That would be like requiring your kid to go get dunked and re-born as a condition of participating in the graduation.
What is the world would make you think that walking into a church would be like getting dunked and reborn. Are you aware that different sects often use the same building. For example the Mosque in Lodi Ca was at one time a Christian church. Your strange premise would certainly not allow this. In fact before buying the building they would have not been able to walk into it and check it out.
It's called an analogy.
Entry into the in-use church building is something apparently forbidden by his religion (presumably deemed an enorsement of polytheism merely by walking into the sanctuary, if it parallels Judaism, which is what I know).
I used "dunking" (a reference to a a protestant practice) as an example of something that would be frowned upon, if forced on a Roman Catholic.
Again, if you read my first post on this thread, I have no idea if this is a legitimate muslim religious objection. Indeed, I doubt it is.
If so, however, it is, and should be, legally protected.
Otherwise, the secularists who run most schools will be forcing Islam on your kids.