Disputes among Muslims often occur because of the inability of these people to respond to differences in understanding that occurs among Muslims.
Differences in understanding that are furu'hiyah have long occurred among Muslims, even since the days of friends there have also been differences between the friends in understanding the Prophet's command.

Likewise, schools of jurisprudence that developed among Muslims are also not immune from the existence of differences. In responding to this difference, the Imams of madzhab can respect and respect each other among themselves. But often among the followers of the schools who are overreacting by requiring others to follow their schools and blame those who do not share their understanding.
Therefore in this paper briefly discussed four schools of thought

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Hopefully this application is useful, amen.