Why were the Habsburg officials thrown out of the windows during the uprising in Prague?

The events associated with the ejection of the imperial governors from the window of the Prague Royal Palace in 1618 were called the Prague Defenestration, which led to the outbreak of the Thirty Years War.

In the Holy Roman Empire, of which the Czech Republic was a part, in the 17th century, a religious conflict ripened between Protestants, including Czechs, and Catholics.

The new emperor of the Holy Roman Empire, Ferdinand, supported the counter-reformation, infringed on the rights and freedoms of the Czechs, because of which they rebelled.