This is a very important and encouraging study.
When something gains enough acceptance to become legal, there’s a positive feedback loop that increases public support for it. Marriage equality, LGBT rights, cannabis legalization, and abortion are all topics that, up until the last decade or two, still required a hard fight to make/keep legal. It’s the same as interracial marriage, or gender discrimination.
Once it starts to turn the other way, once it becomes something politicians can be demonized and taken as if they had a serious argument, public perception can shift in the other direction. i hope we don’t see that but I am afraid that we will.