One Way to Identify a Racist

Someone who wants to “reinforce the border” is not necessarily a racist. He/she might be excessively paranoid about rest of the world and excessively trusting of the US government (please note that a border fence, for example, can be used to keep people in and that the border controls are likely to be run by possemaniacs or sadists) but that might not be racism. It's racism when someone only wants to fortify the southern border and ignores the northern border.