4. Because Mordechai was great in the house of the king, and his reputation went out in all of the states because the man Mordechai was becoming greater.
The Vilna Gaon explains that the verse stresses that Mordechai is growing in greatness because he kept growing in greatness gradually. This is because, as the Talmud Yerushalmi points out, the righteous do not become great overnight, but rather require much effort. As the verse (Mishlei 4:18) says, the way of the righteous holech va’or “increases its brightness.”
The Alshich adds that the governors and other political leaders at the time were especially nervous about Mordechai’s new power because he hanged Haman, and Haman was much more powerful than those governors, so their lives were especially cheap at the time.
Yosef Lekach writes that although Mordechai was not yet the viceroy, knowing the ways of the palace as they did, they recognized that Mordechai was on his way to that position.
Malbim notes that there are three major areas of political power: in the palace (chief of staff), domestically (governor), and in foreign affairs (Secretary of State). Mordechai reached greatness in all three of these areas, as the verse testifies by mentioning the beis hamelech (“house of the king”), kol medinos (“all of the states”), and holech v’gadol (“leaving [the country] and being great”).
Nachal Eshkol points out that some people are powerful, but they are relatively unknown by the general public. Mordechai, however, was both great in name and reputation.
The Vilna Gaon writes that this verse stresses that these people feared Mordechai, as opposed to the general populace mentioned in the previous verse. This was a more powerful deterrent because the officials knew how Mordechai’s power translated in the inner circles of the palace.
Malbim adds that, having the more detailed versions of the original decree, these officials had to choose between supporting the enemies or the Jews. Because they feared Mordechai, they decided to do the politically expedient thing – nothing.
3. And all of the officers of the states and governor and lesser (governors) and the doers of the work of the king supported/honored the Yehudim because the fear of Mordechai fell on them.
Rashi explains that the officers “that are the king’s” are those who serve the needs of the king.
As Avigdor Bonchek points out, the verse is demonstrating that fulfilling the king’s needs is not only the job of these servants, but their very title and identity is in their attendance to their responsibilities.
Megillas Sesarim notes that, despite the contradictory nature of the two decrees, it was a miracle that nobody stopped the Jews. Usually, vagueness and possible misinterpretations of these types of edicts would give people pause, but the people’s awe of the Jews checked that.
Rav Arama writes that after the sending of Haman’s original decree, Jews likely went into hiding. At this point, they now felt confident to come back into the cities, and reestablishing their economical and social infrastructure there, making the cities their own again.
2. The Yehudim congregated in their cities in all of the states of King Achashverosh to send their hand against those who sought bad for them. And a man did not stand before them because the fear of them fell on all the nations.
The Rosh writes that the verse stresses that the Jews gathered because they came together to pray and fast. As is mentioned in Halacha (Mishna Berura 686:2), this is the reason for fasting on Taanis Esther before Purim.
There is a power in numbers, and congregating can have powerful affects, so R’ Aryeh Leib Tzonetz and the Sfas Emes note that Haman’s spiritual power was due to the Jews being splintered and separate (Esther 3:8). Therefore, the intent of this verse, Mordechai’s order for the Jews to be gathered before Esther approached Achashverosh (Esther 4:16), and even the mishloach manos gifts (Esther 9:19) after the miracle was to unify the Jewish people.
The Rishon L’Tzion suggests from a verse in the Torah (Shemos 17:16) that enemies always means the nation of Amalek.
The Vilna Gaon says that an oyev (“enemy”) is someone who wants to commit harm, whereas a soneh (“hater”) is someone who rejoices in others’ misfortune and harm. In this case, the redemption was so complete, that both were attacked.