This is a very important part: > It is important to note that throughout our analyses, the topic of immigration elicited the strongest polarized response. That

This is a very important part: > It is important to note that throughout our analyses, the topic of immigration elicited the strongest polarized response. That these effects did not extend to the other political topics is likely the result of the political climate at the time of data collection, which took place at the beginning of 2019, only a few months after D. Trump introduced the Build the Wall, Enforce the Law Act. So it doesn't seem that there is a difference in general, just that the climate then created a very different environment for the sides. They didn't find such differences on abortion or black lives matter, its just immigration in a very special time.