Respected Sister, Salaams!
How can I forget you and your family?
God has given you a noble and discerning heart. You are quite right in your thinking. The assertion of abrogation has been one of the most cunning and shameful acts played by the enemies of Islam.
The Qur'an here talks of some messages given in previous scriptures getting rescinded because of the changing needs of times.
Previous communities had received directives to suit their cultures and tribes.
Islam is a universal DEEN (System of Life). It is not a tribal set of rules.
The Qur'an encompasses the eternal and perfected Message for all times for all humanity.
2:106 Any message of aforetime that We revoke or cause to be lost to history, We replace it with a better or similar one. Do you not know that God is the Supreme Controller of all things and events?
[Some of the People of the Book question why a new revelation was necessary. The evolution of human civilization has now come to a point where the Final Message for all mankind can be given, widely distributed, implemented and preserved forever. So, the Qur’an is now the perfected Message for all mankind at all times; its exact preservation being guaranteed by none but the Almighty Himself. 5:48, 6:115-116, 15:9, 16:101, 22:52]
Thanks, and God bless you all!
Please always feel free to ask any questions.
A lifelong student