They hate, &c. The connection is not "difficult". The Structure is the commentary. Compare Isaiah 29:21.
him that rebuketh, &c.. the reprover.
in the gate: i.e. before the judge.
uprightly. truthfully.
Related Commentaries of Amos 5:10
Amos 5:10
10 They hate him that rebuketh in the gate, and they abhor him that speaketh uprightly.