How do you feel about people who believe in ancient relgions?

yes i belive in greek mythology for lack of a better term when i that i was not christan i was constetly made fun of and was told i was wrong abd i had no rights because i am me no because i did not change my reliogon i was removed from my dads side of the family and i would like to tell my mom and my step dad but then my grandma and grandpa are near death and i want them to die with a smile and i dont know what to do i need help