Why did the separatists who fled london for holland eventually settle in the new world?

The English protestants who wanted to separate from the Church of England due to its corruption were called Separatists. They believed that the true believers should find other Christians and form their separate churches. They were in favour of allowing various congregation to have the right to decide their own affairs instead of submitting it to any higher authority. Separated movement was illegal in England and it followers were labelled as traitors and persecuted.  

They fled from England in search of lands where they could follow their faith. The  first group left for Holland in 1608 and some of these who were pilgrims settles in the Plymouth Massachusetts.