ANSWER:

If you have informed them of their error, your work is done. You don’t have to nag them or shove it down their throats every time you see them.

I adviced my relatives not to celebrate or greet for other religious festivals.In india as my view more than 80% of muslims didnt lives as practicing muslims and they dont know basics of islam , what will i do if they didn’t want our teachings , and my depression is can i leave doing dawah to this type of people.if i keep argue to make them understand i lost the relationship.