Why did people immigrate from Canada to Massachusetts?

Answer 1

For many reasons. Before, during and after the American Revolution Canadians would immigrate to Massachusetts and from Massachusetts for political reasons.

Those loyal to the government and Crown would leave and those loyal to the revolution would arrive.

Of course for many they would immigrate from Canada to Massachusetts for family. Many people in North America can trace their roots back to Massachusetts even today.

Then there are those that move for jobs and economic reasons, which is likely the most common reason today.