Jamieson, Fausset and Brown on Malachi 2:10-16

10-16. Reproof of those who contracted marriages with foreigners and repudiated their Jewish wives.

10. Have we not all one father?--Why, seeing we all have one common origin, "do we deal treacherously against one another" ("His brother" being a general expression implying that all are "brethren" and sisters as children of the same Father above (1Th 4:3-6), and so including the wives so injured)? namely, by putting away our Jewish wives, and taking foreign women to wife (compare Mal 2:14 and Mal 2:11; Ezr 9:1-9), and so violating "the covenant" made by Jehovah with "our fathers," by which it was ordained that we should be a people separated from the other peoples of the world (Ex 19:5; Le 20:24, 26; De 7:3). To intermarry with the heathen would defeat this purpose of Jehovah, who was the common Father of the Israelites in a peculiar sense in which He was not Father of the heathen. The "one Father" is Jehovah (Job 31:15; 1Co 8:6; Ep 4:6). "Created us": not merely physical creation, but "created us" to be His peculiar and chosen people (Psa 102:18; Is 43:1; 45:8; 60:21; Ep 2:10), [Calvin]. How marked the contrast between the honor here done to the female sex, and the degradation to which Oriental women are generally subjected!