Immanuel Kant
"Act only according to that maxim whereby you can, at the same time, will that it should become a universal law."
Jesus
"So in everything, do to others what you would have them do to you, for this sums up the Law and the Prophets."
Hillel the Elder
"What is hateful to you, do not do to your fellow: this is the whole Torah; the rest is the explanation; go and learn."
Slightly varying accents all describing the same foundational absolute.
Hmm... You just litteraly saif that morality is relative...
Your sentences say "don't so to others what you don't want them to do to you". Which means each people will have a different definition of what should and should not be done as each person will consider something as acceptable or not...
Example: I consider ok to take parts of what's mine for the need of others. Some people do not consider it ok. Who is right here? Following your maxime no one is right or wrong, it just depends if you accept it or not.