There are nine articles of impeachment before that one, and one after it. Yet you somehow conclude he was impeached because he gave a couple of speeches.
I highlighted Article X because it demonstrates the off-axis thinking of radical northerners who had insisted on fighting an optional war against the South and the U. S. Constitution. The Radical Republicans were, as we say, Radical.
The fight over the Tenure of Office Act was more substantive but Article X was more illustrative of the north's crazed hatred of their fellow countrymen - and their hatred of Johnson's pursuit of Lincoln's policy of reconciliation.
I believe the U. S. Supreme Court later ruled the Tenure of Office Act of 1867 was invalid.