Misrepresenting the argument is not a good look. The argument is that everyone believes in borders. And that borders aren't racist. The only question is where we personally accept them being drawn. But NOBODY believes they're inherently all bad. Not even the people who pretend to do so, and are all too happy to throw around accusations of fascism and racism, to appeal to base emotion rather than logical and practical arguments.
But the person you are responding to didn't say "any and all borders are racist, including borders in your own home". You are the one misrepresenting their argument.