The latest remarks by United States Republican presidential front-runner Donald Trump have caused condemnation inside and outside the US. Trump called for a ban on Muslims entering the US.
In the US and across the Atlantic in Europe, the inter-linked issues of race, identity and immigration have always been deeply controversial.
On Tuesday, Britain marked the 50th anniversary of its Race Relations Act, legislation that outlawed discrimination on the grounds of colour, race, ethnic or national origin.
And all these years later, Britain is described either as a model of multiculturalism or a model of racial failure - depending on your political views.
On Inside Story, we discuss how and why racism is gaining ground in some countries.

Presenter: Jane Dutton
Guests:
Lee Jasper - Co-chair of the BARAC National Executive Movement Against Xenophobia
Omar Khan -Director of Runnymede, an independent race equality think-tank in the UK
Charlie Wolf -Political commentator and former communications director for Republicans Abroad UK