That’s just normal racism. Mexicans are too lazy to work, but come here and steal our jobs. Muslims come here to force Sharia Law on everyone, but fail to integrate and keep to themselves. Illegals are using public services for free, but pay taxes using fake information and are criminals. Obama was incompetent, but also managed to build complex shadow government. You can just keep going.
By using a dichotomous framework of stereotypes you can easily make a case against an entire population because if one negative stereotype doesn’t fit a given individual you simple apply the other one.