The title is the phrase people repeat after every tragedy, and the poem seems to push back against how empty it can sound. The speaker describes the news as something that "touches" us, but the word feels odd and almost bitter, since the news here doesn't comfort anyone. It buries. The second stanza suggests a parent and child at the center of the horror, and the idea of being buried "day and night" makes the flood of bad news feel suffocating and constant.
The first stanza's phrase "too mad for madness" captures a sense that events have gone beyond what even a word like madness can hold. Nothing makes sense, and there is no reaction big enough to match it.
The last stanza turns toward a grim kind of relief. "Escape lies in the ground / among other people" can be read as wanting to disappear, or as a dark pun on "lies," since escape may be false. The mood is exhausted, numb, and angry, with very little hope offered.