Most poor people of India embrace islam or christianity due to sheer neglect of the state,lack of social security,financial problems,low self confidence,depression/emotional vulnerability etc,so all they need is some support from the majority community,moreover there are thousands of penetcostal missionaries/dawah associations trying to prey upon such weak people using all kinds of incentives like jobs abroad/fair skinned bride etc etc.
so it is natural that they turn their backs when the tide turns the other way,so this should hardly surprise,looks like this ghar wapasi thing does bother you.