Why was Sam Tatum tarred and feathered although this was a terrible act why are the Logan children somewhat relieved

Sam was tarred and feather simply because he had the audacity to call Mr. Barnett a liar. I don't recall the children being relieved, thus, I'll have to go back and check that out.

The children were relieved because the night men didn't come because the bus fell into the ditch that they made. They were relieved that the night men did not come for them.