Let's list the effects of British Colonalism

• High taxation on local products and agriculture leading to indentured servitude.
• Ending royal patronage of artisans causing mass unemployment.
• Artificial famines as foodgrains exported to Europe during European wars.
• Labelling of particular tribes or ethnicity criminals for perpetuity.
• Forcing puritism on ethnic populations.

For more read: -This -This -This

And yes. Religious and ethnic problems were already here but Brits exacerbated it.