Umer Bro, that is the fundamental problem Imam's are appointed by Allah , not selected by men. This is the point that was missed by the majority of Muslims.
There is no such thing as a shia religion. Anybody who believed in the fact that it was Ali's right to succeed is a shia-e-Ali.
The true fiqh is Fiqh Jafaria and that is the fiqh of true Ahl-e-sunnat, and all that oppose the Fiqh Jafaria collectively call themselves as Ahl-e-Sunnat wal jamaat. This is the only real definition of Ahl-e-sunnat wal jamaat.
In terms of Fiqh there are four main fiqh in this jamaat and then 10s of further subdivisions. The positions of each of these fiqhs are at times diagrametically opposed like on divorce, etc.
There are dozens of flavors like ahl-e-hadees, barelvi, deobandi, salafi, wahabi, takfiri, tableeghi, etc etc
very very funny imams appointed by allah even 12 imams are fail to perform their duties, wow, if your beliefs are true why quran is slient about this most important issue.
what is procedure that you acertain that he is imam and he is not since we saw when some one from this family died ppls divided some says he is imam some says fist son is imam some says brother is imam why so much conterversal also did they get message (wahi) from allah that you are imam (even not body announced such fake beliefs)
if ali ra was succesor why he ra did not struggled against ppls who did not support them.
prove me fiqh of jafferya exist, since not preached by hz. jaffer-e-saddiq rah himself and also tell me how completted this fiq.
for your information, we have only for madhab hanafi, shafai, maliki, and hambuli, and also gheer muqlid called ahlul hadith.
brailvi and deobandi practicing same school of thought i.e. hanafi.
salafi/wahabies are not sect.
tablighi are part of deoband group.