Does bid'ah (religious innovation) have barriers, just as kufr (disbelief) has barriers?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: Is bid'ah like kufr in that it has barriers? That is, if we say that not everyone who falls into kufr is actually a disbeliever, do we say the same regarding bid'ah?

Answer:
If the person did not invent the bid'ah, but rather thought it was valid because he did not know the criterion distinguishing bid'ah from the Sunnah, then he is ignorant. This is an ignorant person, and it is explained to him. However, if he knows that it is a bid'ah and that it has no basis, then he is an innovator. For this reason, it was said: So the one who innovates is an innovator. Then, in the second narration, it was said: Whoever does a deed for which there is no command from us, it is rejected. So whoever acts upon a bid'ah, even if he did not invent it, is an innovator, unless he is ignorant and does not know that it is a bid'ah. Yes.