I think you've got the point: it's to drive all the minorities from that part.
I can tell you a story. Our national mosque is Baitul Mukarram. The chief priest of the mosque once said that in Muslim countries, only Muslims should stay, that those who are of other religions there have to convert to Islam, and that in the democratic countries, their people will go and establish their rights over there.
Naturally, these Jamaats or other Islamic parties, their goal is to.... I'll tell you. In one family, if one girl is raped, the entire community will deviate from this family. That family then has no choice but to leave the country. That way, they are keeping two things in mind: land grabs and minority girls.