Was it justified to check Ahmed Mohamed's clock for a bomb?

Maybe the teacher thought it may be a bomb because it looks like a freaking bomb? There should be nobody blaming the school teacher and administration. There are so many terrorists nationwide aside from knowing Muslims are training their young generation how to assemble bombs and no one can deny the suicide bombers are rampant. The police questioned the kid, but he wasn't able to explain himself and that's why he was taken into custody. Obama needs to concentrate what's more important with our nation. If he really wants the Mohamed family to come over in a white house, he should do it when he is not getting paid during office hours.