How the five pillars of Islam create brotherhood?

The five pillars of Islam help in unifying all Muslims all over the world.

The first pillar (testimony of the oneness of God and that Muhammad is his messenger and prophet) unifies the Muslims on the worship of one and only one God.

The second pillar (praying or Salat) unifies Muslims especially during the ritual praying in a gathering in Mosque (daily, on Fridays, on the feasts, in Ramadan during praying in a gathering for what is called Taraweah)

The third pillar (Alms giving or Zakat) unifies Muslims when they feel that the rich is feeling with the poor and gives him from his money or property.

The fourth pillar (fasting Ramadan) unifies Muslims when they all are fasting for the same period.

The fifth pillar (pilgrimage or hajj) is the strongest demonstration of Muslim and Islam unity when Muslims from all over the world come together in the annual world biggest gathering in response to God call for Hajj.

see related questions below for more information

Answer B:

Five Pillars of Islam according to shia Muslims are:

1. Monotheism: The Oneness of Allah (tawhid)

2. Divine Justice ('adl)

3. Prophethood (nubuwwa)

4. Succession to Muhammad (imamat)

5. The Day of Judgement and the Resurrection (Qiyama)

Practices of Islam according to shia Muslims:

1. Prayers (salaat) - 5 times a day

2. Fasting (sawm) during Ramadan

3-4. Alms giving (zakaat and khums) 5. Pilgrimage to the city of Makkah (hajj)

6. Holey Defense (Jihad)

7-8. Enjoining good (amr bil-ma'rouf) and forbidding evil (nahiy an al-munkar)

9. Supporting those who walk in the path of Allah (tawalli li awliyaa' Allah)

10. Turning away from the enemies of Allah (tabarri min a'daa Allah)

Five Pillars of Islam according to Sunni Muslims are:

1. professing (Shahadah)

2. Prayer (Salat)

3. Alms-giving (Zakāt)

4. Fasting (Sawm of Ramadan)

5. Pilgrimage to Mecca (Hajj)

also different schools of sunni have differs in five pillars.