Do you find a problem with her statement that you posted? I am no philosopher, not really sure what "post-modernity" means but it seems to be referring to the times that we live in. Times change, people change and society changes with them. What worked in the 1800s didn't in the 1900s and now we are in the 2000s. Many of the styles of worship and the activities of churches today that we find to be normal and acceptable would have been seen as blasphemy less than one hundred years ago.
That may be true, but the moral standards that God put forth never change.
The author you're listening to claims to be a minister. If she was a true minister of God's Word, she would know that her delivery of the Gospel is a direct violation of God's moral standards. God never changes.............ever. That's what makes Him unique. He doesn't change with the times.
Here's something from the bible regarding teachers.
1 My brethren, let not many of you become teachers, knowing that we shall receive a stricter judgment.
2 For we all stumble in many things. If anyone does not stumble in word, he is a perfect man, able also to bridle the whole body.
7 in all things showing yourself to be a pattern of good works; in doctrine showing integrity, reverence, incorruptibility,
8 sound speech that cannot be condemned, that one who is an opponent may be ashamed, having nothing evil to say of you.
These are just 2 examples. The bible is filled with examples of how we are to conduct ourselves. If we to call ourselves sons and daughters of God, there can be no compromise of His moral standards. Once we compromise those standards we transform God into something that is no different than the countless other gods that are worshiped around the world.