The first picture resembles a school. Churches, most of the times have insignias on the tips of the spires.

It seems he saying the island isn't the school, so he is confused, perplexed. Though... if you relate his message to our situation, it is not difficult to understand he is also disconcerted. Perhaps he lives near at school or goes to school, therefore, when we all returned to our homes, he returned to school.

I don't understand the fifth image, but it seems to imply an uncertainty, perhaps company he doesn't have.