Not quite-they suggest a very specific method of asking people to empathize with people works, not just generally 'being nice' and it's not clear how aggressive they were. They also found that attack ads worked (just not quite as well as their specific technique). They also found that the effects weren't particularly dramatic. A fraction of a standard deviation, more or less-and if I'm reading the graphs right they were actually much more inclined to be positive towards trans people than the mean population (including the placebo respondents). So I'm going to still suggest that this is not an incredibly reliable method of changing people's minds-but then again, very little is so... you're part right. It
can work. It's just that it's incredibly resource intensive and I'd want to see if it works on people who aren't already inclined towards you first.
Because that's not the problem-I don't think the social justice advocates are having a huge problem getting people already on their side to agree with them. The problem is convincing the people who
aren't inclined towards you.
It's an interesting finding but it still suggests "this
might be better" instead of "this is better than stoking up your base and being all kinds of mad against people."