Answer: Nativism is shown. Miscegenation is a maybe.
Step-by-step explanation:
Nativism is the policy of protecting the interests of native-born or established inhabitants against those of immigrants.
Miscegenation is sexual relationships or reproduction between people of different ethnic groups, especially when one of them is white. I'm not sure if the cartoon really portrays this, but maybe it could be implied that they were against miscegenation.
Racism is a no because, in terms of immigrants, the correct term would be xenophobia.
Colonialism is also a no because this is talking about nationalism and not colonizing.