Goans consider themselves to be more than Indian, and essentially different. While not entirely different, Goans do consider their roots to be different from those of other Indians, and therefore they should have different ID cards if they want them. In states we often have different ID by state, there are government ID cards for those who work in government. If Goans want unique ID cards, they should have them.
I think there are plenty of more important things that should be worked on instead like developing the country. I do not believe the people are content with having to deal with more cards than they already have to especially when the lot of them would rather see that money going to creating more jobs for them.