Adam Clarke on Genesis 33:1

Behold, Esau came, and with him four hundred men - It has been generally supposed that Esau came with an intention to destroy his brother, and for that purpose brought with him four hundred armed men. But, 1. There is no kind of evidence of this pretended hostility. 2. There is no proof that the four hundred men that Esau brought with him were at all armed. 3. But there is every proof that he acted towards his brother Jacob with all openness and candour, and with such a forgetfulness of past injuries as none but a great mind could have been capable of. Why then should the character of this man be perpetually vilified? Here is the secret. With some people, on the most ungrounded assumption, Esau is a reprobate, and the type and figure of all reprobates, and therefore he must be everything that is bad. This serves a system; but, whether true or false in itself, it has neither countenance nor support from the character or conduct of Esau.