Why the Nehru Parivar become Gandhi title?its is political benefit,good relation with Gandhi .?

Indira daughter of pandit nehru married a muslim named firoz khan. nehru was against this marriage so matter went to Gandhi for settlement.He said he would give his surname to firozkhna and call him firoz gandhi so that people may believe that he is a parsee or a gujarati.This shows gandhi was not very honest in his approach to Hinduism.Indira became Gandhi and the world began to believe that she is in some way related to mahatma Gandhi. The gandhi fraud continues even now after rajiv khan marrying Italian Sonia. Sonia has also become a gandhi. Now they have inducted Rahu gandhi as latest addition of frauds. It is even doubtful whether Firoz khan ever registered a change of name.