Why do many Republicans want deportation even for “good” undocumented immigrants?

I know asked man who is in the us illegally. He's from Mexico. He works his ass off and provides for his family. Doesn't use any government benefits. Volunteers. I told my mom this. She got mad and said he needs to he deported. Im pretty sure she knows who im talking about and im afraid she's gonna call ICE or something. Most Republicans I've talked to feel this way. So long as they are illegal then they need to be deported no matter how good of a person they are.

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Are they just racist?
Why do many Republicans want deportation even for “good” undocumented immigrants?
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