shia kay ilawa, baki sab firkoon main tafreek ghalt hay, becoz shia ka tu kalmay se lay kar jinazay tak sab kuch he Muslims se different hay!!!!!!! likin barelivi, deobandi aor ahle hadees main tafreek nai karni chaiay!!!!!!!
Bro look at it in this way. The Religion of Islam came over 1400 years ago to this earth through the Greatest Man ever walked this earth, our beloved Prophet Muhammad Mustafa, SAW (may blessing of Allah SWT, all His Angels and humans be upon him). He SAW according to the teachings of the Holy Quran said you are one Ummah, do not divide yourself in Sects like the people before you did. Quran decreed anyone who divides the religion of Islam, his/her affairs are with Allah SWT, on the day Judgement He SWT would take care of those who divided the Religion of Islam in to Sects.
The three sects you mentioned were all created around 150 to 200 years ago when British were ruling the sub-continent. The British are/were famous of their dictum "Divide and Rule". So why follow sects created under this practice of enemies of Islam?
Similarly Wahabis were created in similar period, under similar political conditions.
I have always asked a very simple questions from the followers and proponents of these sects, please tell me which Sect Prophet Muhammad SAW and his SAW beloved Sahaba's belong to?
Sectarianism is a malaise and should be avoided at all costs. I am afraid most of those who try to preach it are ignorant about Islam, they are only interested in their own interpretations. Please learn the Holy Quran, Allah SWT decreed He SWT has made it easy for you to understand it.