Xenophobia
Xenophobia was the fear and/or hatred of strangers, foreigners and aliens.
On Skaro, Ian Chesterton recognised that the Daleks were intensely xenophobic, describing their hatred of the Thals as a "dislike for the unlike". (TV: "The Ambush")
20th century author H. P. Lovecraft was notorious for his xenophobic views. He was particularly disgusted by Calypso Jonze, calling them a "mongrel", earning him a punch from them. (AUDIO: The Lovecraft Invasion)
The Seventh Doctor described the 1950s as the height of American xenophobia as a result of the Cold War. (COMIC: The Good Soldier)
Xenophobic views towards the Welsh was known as Cymrophobia. (AUDIO: Superiority Complex)
Maddie Potter once told Alice Obiefune that her parents should "go back to where they came from". When Alice told her that her father was dead, Maddie's own father said "good riddence". When Alice told her teacher about this incident, she dismissed it as "teasing", something which she "always" did. (COMIC: Whodunnit?)
In 2016, Chris Richards made a remark to Matteusz Andrzejewski that he should get back to his home country of Poland and that he was unwelcome in the United Kingdom. (AUDIO: Now You Know...)
In the year 200,000, the Jagrafess manipulated humanity into becoming increasingly xenophobic. (TV: The Long Game)
The Inter Minorians became xenophobic after the Great Space Plague had been brought to their homeworld, Inter Minor. (TV: Carnival of Monsters)
In the late 22nd century, a political group called Earth United was created by xenophobic humans to prevent aliens from re-invading Earth after the Dalek invasion. (AUDIO: An Earthly Child)
The human colony of Urth was intensely xenophobic towards towards anyone from outside their settlement. (AUDIO: For the Glory of Urth)