What did Antiochus Epiphanes do to the temple that made him important in Scripture?
Antiochus Epiphanes defiled and decimated the temple by sacrificing a sow, a hog, on the altar, an act of horror to the Jews. He is important in Scripture because, like the coming Antichrist, he overran Israel and desecrated the temple, prefiguring the abomination that will occur at the midpoint.
Les explains that Antiochus was not a great man in world history, but he was great in Scripture because he, like the man Antichrist, overran the little nation of Israel around 200–300 B.C. He decimated and defiled the temple by sacrificing a sow, a hog, on the altar, and this was horror to the Jew. Les then suggests the coming Antichrist will do the same: when he comes into the temple, he will defile it, desecrate it, and perform acts of abomination, epitomized by the offering of a hog on the altar in Jerusalem.
And arms shall stand on his part, and they shall pollute the sanctuary of strength, and shall take away the daily sacrifice, and they shall place the abomination that maketh desolate.