Charles H. Spurgeon on Psalms 74:4

They set up their ensigns for signs. The meaning is, that the enemy, having abolished the signs of the true God, of his people and religion, such as circumcision, the feasts, sacrifices, the other ordinances of religion, and other marks of liberty, substituted his own idolatrous signs, as the signs of his authority and religion. Hermann Venema.

Verses 4-7. (The persecution under Antiochus. B.C. 168.) Athenaeus proceeded to Jerusalem, where, with the assistance of the garrison, he prohibited and suppressed every observance of the Jewish religion, forced the people to profane the Sabbath, to eat swine's flesh, and other unclean food, and expressly forbade the national rite of circumcision. The Temple was dedicated to Jupiter Olympus: the statue of that deity was erected on part of the altar of burnt offerings, and sacrifice duly performed... As a last insult, the feasts of the Bacchanalia, the license of which, as they were celebrated in the later ages of Greece, shocked the severe virtue of the older Romans, were substituted for the national festival of Tabernacles. The reluctant Jews were forced to join in these riotous orgies, and to carry the ivy, the insignia of the god. So near was the Jewish nation, and the worship of Jehovah, to total extermination. Henry Hart Milman (1791-1868), in "A History of the Jews." (Under Titus.) And now the Romans, upon the flight of the seditious into the city, and upon the burning of the holy house itself, and of all the buildings lying round about it, brought their ensigns to the temple, and set them over against its eastern gate; and there did they offer sacrifices to them, and there did they make Titus imperator, with the greatest acclamation of joy. Josephus.