Here's a breakdown of why:
* Religious differences: The Scots were staunch Presbyterians, believing in a simpler form of worship with less emphasis on rituals and ceremonies. They were deeply opposed to the hierarchical structure of the Church of England and its elaborate liturgy.
* The Book of Common Prayer: In 1637, King Charles I attempted to impose a new version of the Book of Common Prayer on the Scottish Church. This was seen as an attempt to Anglicize Scottish religion and undermine Presbyterianism.
* The National Covenant: The introduction of the new prayer book sparked widespread outrage in Scotland. People saw it as an assault on their religious freedom and national identity. As a result, they signed the National Covenant, pledging to defend their Presbyterian faith and resist the King's imposition.
* The Bishops' Wars: Charles I's attempts to force the new prayer book on Scotland led to a series of armed conflicts known as the Bishops' Wars. This conflict further inflamed tensions between the Crown and the Scottish people, contributing to the outbreak of the English Civil War.
In conclusion, the Scots' rebellion against the new prayer book in 1637 wasn't directly about the English Civil War, but it played a crucial role in escalating tensions between the King and his subjects, making the war more likely. It was a significant event that highlighted the deep religious and political divisions within the British Isles, which ultimately led to the outbreak of the English Civil War.