

Islam, just like Christianity, has many different groups that believe the same basic doctrine but disagree on many points. The main splits in Islam (that echo some aspects of the Catholic vs. Protestant split) as Sunni and Shia. Each divides and divides again into small communities centred on one mosque (just as, eg, Protestantism divides and divides down to individual congregations).
The big question is: how do groups of people decide which parts of the religious documents, history and practice are more relevant or even correct?
Some groups are quite ‘secular’ (like the Church of England) while others are quite ‘fundamental’, meaning that they much more strictly follow whatever the group decides are the foundation of the religion.
Is it possible to be able so say which of these groups is right? It seems to me that we have been fighting over this since before records began, so we most definitely do not have a way to do this that any majority agrees with. I don’t think anyone can say:
Islamist groups purposely … twist actual Islamic ideology while the Christian Right just doesn’t understand the religious text they claim to follow.




There’s another factor - days where thr earth is orbiting faster, eg on the closer side of the ellipse - are a different length midday to midday from when we are on the far side of the ellipse.
You can convince yourself of this when you consider that the area of the arc we traverse each day is the same (Kepler’s law). On the short side of our eliptical orbit, since the orbital distance is shorter, the arc must have a larger angle that we travel. That means the amount a point on the earth rotates to have the sun come back directly overhead must be different in different parts of the year.
This difference, summed day over day, results in a +/- 20 min movement of actual midday to 12pm. The ‘mean’ in Greenwich Mean Time refers to averaging this difference over the whole orbit.