I'm a descendent of the Jews as well, but I'm a third generation Christian branch of the family.
Before that the Jewish ancestor's father was from Germany. He was born and raised in Boston, MA, and from there he traveled west and found himself on a boat heading to the South Pacific, where he eventually founded our family in German colony. To save his children from the anti-semitic Germans, he gave his children a German last name and baptized and raised them as Christians.
Our Jewish origin remained undiscovered until recently when a member of our family traced our genealogy and discovered the truth.
Oh, I'm suspicious of the guys in India, but it isn't up to me. It is up to Israel if they are going to deny immigration rights to 5,000 practicing Jews based suspicion of their bloodlines. Israel should know that to deny a group that large would be too close to the same mindset that led to the German attempts to exterminate the Jews. The whole Master Race theory too...
Israel won't and hasn't denied this group the right to make aliyah. As long as they convert according to halacha, they are Jews, no matter what their skin color. A lot of them already live in Kiryat Moshe in Jerusalem.