Thine enemies roar, &c.— i.e. "They triumph in those places where thy people formerly met to worship thee." See Psalms 74:7. For signs, means, "As trophies, in token of their conquest over us."
Related Commentaries of Psalms 74:4
Psalms 74:4
4 Thine enemies roar in the midst of thy congregations; they set up their ensigns for signs.