Gaal the son of Ebed said, Who is Abimelech, and who is Shechem, that we should serve him? Isn't he the son of Jerubbaal? and Zebul his officer? serve you the men of Hamor the father of Shechem: but why should we serve him?
In other words, he's an outsider. We ought to be serving Hamor and his family, let them be the kings. And he said to God the people were under my rule, because I can really do a good job here, you know. Who's Abimelech? And so he said if you would just commit yourself to me I would remove Abimelech.