Why is the UK seen as such a bland country?

Americans in particular see the British as being all white, Christian, conservative and traditional. They don't seem to understand that the UK is a multicultural country and has people from all religions, walks of life and ethnicities. Modern UK is anything but bland, yet the over-whelming perception... show more Americans in particular see the British as being all white, Christian, conservative and traditional.

They don't seem to understand that the UK is a multicultural country and has people from all religions, walks of life and ethnicities.

Modern UK is anything but bland, yet the over-whelming perception internationally is that the UK is the ultimate boring, white, Anglo-Saxon Protestant country with no diversity and no cultural diversity.

Why is this percetion so over-whelming?
Update: perception* typo
9 answers 9