Talk is cheep, every Democratic president in my lifetime has cracked down on immigrants. If Harris does the same are you going help speak out against it or will you just ignore it?
If she changed her mind, why isn't she saying or doing anything about the border wall and the internment camps? She's the VP, she has Biden's ear and can exert tremendous pressure on policy-makers.
I would be willing to accept the possibility of her views changing if there was any evidence her views have changed. I haven't seen any evidence though, and so I think the safest assumption is that she's still the same woman that kept people in prison past the end of their sentence and denied healthcare to trans people in prison.