yes
Believing in the five pillars is a must for a Muslim. He is also required to act upon these pillars. Anyhow, if a Muslims does believe at heart in the 5 pillars but is slack in practising them, he may repent at any time. Allah Almighty is Oft-Forgiving, the most Merciful.
Muslims call their pillars/towers minarets.
All Muslims. Refer to related question below
Prophet Muhammad (PBUH) was given the five pillars by inspiration from Allah (God in English) through the angel Gabriel (Jibril). This explains that these pillars are stated in Quran too.
Hajj is not a person. It is a pilgrimage made by Muslims because it is one of the 5 Pillars Of Islam
Muslims know and believe that following the Islam 5 pillars is a chracteristic of the Muslims. Who abandons following any of the Islam 5 pillars, intentionally, is not only sinful but also is no longer considered Muslim.God is All-Merciful. Who committed this sin should be confident that God may accept his repentance if he intends heartily that he will follow the five pillars without any denial.See for more information the related question below.
It makes them remember Allah (God) often...
It makes them remember Allah (God) often...
realign is a path which you will stay on for all your life for example for Muslims there path is the 5 pillars and for siks there is the 5 ks
Fasting Ramadan (Sawm) and performing pilgrimage (Hajj) are the fourth and fifth pillars of the five Islam pillars. Refer to question below.
because they are rules on how muslims should live thier life.
Because the five Islam pillars are the basis of Islam religion. The five pillars represent the basic practices for any Muslim. Denying any of these pillars intentionally and knowingly by any Muslam brings him/her out of Islam. Refer to question below for more details.