Xenophobia

Xenophobia was the fear and/or hatred of strangers, foreigners and aliens.

On Skaro, Ian Chesterton recognised that the Daleks were intensely xenophobic, explaining their hatred of the Thals. (DW: The Daleks)

The Seventh Doctor described the 1950s as the height of American xenophobia as a result of the Cold War. (DWM: The Good Soldier)

In the year 200,000, the Jagrafess manipulated Humanity into becoming increasingly xenophobic. (DW: The Long Game)

The Inter Minorians became xenophobic after a space plague had been brought to their world. (DW: Carnival of Monsters)