To what extent do our moral ideas reflect the society around us, and to what extent are we free to think four ourselves about moral matters?

Our moral ideas are definitely influenced by the prevailing ones in society, ones which are reinforced by the news media on a daily basis. For example, the moral idea that it is acceptable to punish Venezuela for conducting its own internal elections is pushed in the media, and the UN non-interference in the internal affairs of other countries and respect for the sovereignity and territorial integrity of other countries is ignored. On the other hand, I believe it is becoming more acceptable for a white man to marry a non-white person and have the free choice to do so, though the Trump supporters don't believe this.