Paradoxically, it might be the other way round. The Biblical folks were always very superstitious, and this is clearly documented in the Bible even before Christ.

Now, what Jesus taught is one thing, but what people created is another one. What Luter revolted against, for example, were not the teachings of Jesus, but all superstitions that were created by Christians and deemed to be Christianity.

Even today, when you talk to Christians, many of them believe in various superstitions. So, frankly, the opposite of your statement might be true.