That sounds like "I didn't read the Bible but somebody told me about it".
How do you know that Kiss didn't copy them? Anyway, I really don't care. Eric Carmen used Rachmaninoff in one of his songs. So what?
You have yet to be honest enough to even listen to them. You criticize something you have never even heard. That's called ignorance.
If you read how I explained I heard them, you’d have known I heard both versions because I heard them at a presentation where both snippets of the songs were played for comparison. I heard both actual snippets of each groups’ songs.
The presenter also explained that Kiss’ song came out first, in the 1970s. Just google “petra used kiss riff seen and not heard” and you’ll find plenty of notation that Kiss’ song came out first.
So to you Kiss is the same music style as Rachmaninoff?
Again, I have heard the pieces I am talking about. You don’t have to listen to every christian rock band to understand what they are playing is secular music, dressing like secular groups (just look at their album covers and videos), behaving like secular rock groups on stage, with a christian veneer over their music.