How many people helped the Japanese Americans who were put in internment camps? The Supreme Court gave that the seal of approval. I'm having trouble trying explain something that is so clear and obvious. Building camps that are meant to imprison people against their will, without committing a crime, or due process, is unacceptable on its face. You don't have to factor in other issues that don't matter.
Bringing up irrelevant points about the numbers of certain groups, or how armed they are is just a sign of being in denial. Their chances of success at this point in history doesn't matter. The real concern is that if we allow this to happen now, over years or decades the concept will be normalized, accepted and expanded. In that time gun rights will continue to be eroded, attitudes will continue to be shaped through propaganda, and eventually we will have the 4th Reich. There will be no allies coming to the rescue.
But you're right, it's doomed to failure because "muh guns".