Daniel 11:21

21. A vile person This was Antiochus Epiphanes, of whom we have already heard so much. (See Daniel 7:8; Daniel 7:20-21; Daniel 7:24-25; Daniel 8:9-19; Daniel 8:23-25; Daniel 9:27.) Demetrius Soter was the son and rightful heir of Seleucus IV, and had doubtless received the honor [the royal dignity] of the kingdom, from all lovers of the ruling house; but Antiochus, the brother of Seleucus IV, upon his death (for which many think this “contemptible” person was responsible), treacherously seized the throne. (See note Daniel 7:24; Daniel 8:23.)

He shall come in peaceably Rather, in time of security; that is, when men are careless and not expecting change. (Compare the use of the word in Jeremiah 22:21; Ezekiel 16:49.) So the word also carries with it the idea of “unawares,” “unexpectedly.” “The FLATTERIES or dissimulation by which he obtained the kingdom refer to the artful representations of his claims and plans by which he induced Eumenes and Attalus, kings of Pergamos, to help him expel Heliodorus and recover the throne for his own family. The same arts of dissimulation doubtless served him further in adjusting things in Antioch after the overthrow of the usurper Heliodorus.” Terry.