Total Unity Between All Jews

The first duty of the month of Sivan that we should examine is that of its first day - the day of Rosh Chodesh. It was on Rosh Chodesh Sivan that the Jews reached the Sinai Desert and "He, Israel, camped there facing the mountain". It does not say "they camped", but "he camped", which indicated that the Jews were united "as one man with one heart"...