Re: Shabe Barat
salam shikra, here is a definition of Bidah..
as he says, an act that we consider wajib, we do not consider shab-e-raat compulsory. also, we have much evidence regarding this night.
as for following a madhab please have a read here: Understanding the Four Madhhabs (with footnotes)
remember the old saying “Difference of opinion is a mercy” so we cannot just say one is right and one is wrong. http://www.paklinks.com/gs/religion-scripture/287699-etiquette-diference-opinion.html