Does everyone who falls into bid‘ah fall into the forbidden?

The ruling on innovation (bid'ah) and the ruling on the one who commits it vary according to its type, its position regarding fundamental principles (usul) or subsidiary matters (furu'), and the state of the innovator. Innovations are forbidden and a form of misguidance. The degree of prohibition varies according to the type of innovation. Some innovations are clear disbelief (such as circumambulating graves to seek closeness to their occupants), some are doctrinal transgression (such as the innovation of the Khawarij), and some are mere disobedience (such as excessive asceticism or standing in the sun while fasting). Some innovations may be disliked (such as excessive ornamentation of mosques), or permissible (such as expanding on food and drink without extravagance).

As for the sin of innovators, it is not of a single rank but varies according to: whether it is secret or public, whether one calls others to it or not, whether the innovation is actual or additive, whether it is clear or problematic, whether it constitutes disbelief or not, and whether one persists in it or not. Thus, the sin of one who calls others to it is greater, an actual innovation carries a heavier burden of sin, a clear and contrary innovation is more grievous, persistence in an innovation magnifies its sin, and an innovation that leads to disbelief is the gravest of all innovations in terms of sin.