Because they rebelled against the British and demanded independence.
Afghanistan became an independent state when Amanullah established an alliance and signed a treaty of friendship with the Soviet Union. Hope this helps if you have any questions please feel free to message me;)
Martin Luther had the greatest Impact on the Protestant Reformation. He called out all of the bad things, and hypocritical things the catholic church has done, causing people to questions the teachings of the catholic church and turn to other religions