The gospel of Luke was written around 80ce by a unknown author and to make his account seem a genuine account he includes this statement about wolves in sheep's clothing,
There were many jesus stories going around at this time by other authors with possible claims that their version was the true one .
So just like there are many versions and beliefs of jesus today each claiming includeing jws that they have the true version and they each say that the others are wrong and trying to mislead people today
They all can't be right but they all can be wrong.