My entire family, all of my friends along with my parents friends support Modi and many of them are pretty liberal as well. Like I have many friends who are Sanders supporters and they all support Modi as well. Compared to the vast majority of them I wouldnt be considered a Modi supporter.
It is quite common for people to be conservative/nationalist in their original country and liberal in their adopted country. You mention Indians, presumably Hindus. Lots of recent immigrants from the middle east are hard right on social issues or wear hijabs (unlike liberal seculars in their home country) but vote D. Lots of Jews are liberal in the US but support Likud and don't support any rights for Palestinians. Plenty of Latinos who support right wing anti-worker authoritarians in their original country vote D. And Americans who live in other countries tend D even though they may come from R demographics. And then there is the case of people bringing old world battles with them (Cubans, Vietnamese, etc.).
Conservatism is often about majoritarianism, not about any fundamental ideological beliefs, and conversely for liberalism. Once you perceive yourself in the minority, you vote liberal. And then you get absorbed a few generations down the line (if you don't look too different) and become conservative against the new minority.
