Answer:
Britain was against the American Independence because America would be the first colony to gain independence from its western colonist and it would create a revolution and rebellion in other parts where britain had colonised.
Step-by-step explanation:
The news that America was finally going to be independent from the Britain, it shocked everyone. They were not expecting that Britain would let loose on the Americans.
The economic advantages were highly effected, America was a great hub of resources. Britain's were afraid that seeing how Americans have gained freedom, other countries might get the same idea and rebel.