Singing the "Happy Birthday" song is "offensive"?

I am getting to the point where I've come to expect stories like this one to become more frequent as the absurdity of political correctness continues to grow.

Excerpt:

"The school district acknowledged the situation could have been handled a bit more delicately.

'Mrs. Davidson has freely admitted that she didn’t communicate that very well,' Cranston said. "

Ya think?

This is a natural consequence of allowing products of Government Schools to teach in Government Schools.