That's how society progresses though. Before 1865, slavery was mainstream and abolitionists were weird radical crazies. Before 1965, "Jim Crow" laws that said non-whites had to use different bathrooms and drinking fountains were mainstream, and people who opposed them were seen as unreasonable.

And back in the 1960s a planned economy was normal and reasonable, and many progressives openly called for normalisation of sex with teenagers. Sometimes shifts in attitudes are progress. Sometimes they're just a random walk. Sometimes the left is right, sometimes the right is.