Abortion, LGBTQ rights, and immigration are inherently deeply emotional issues, but that doesn't in itself make them partisan. It increases the risk that they will become partisan, but often enough and in enough places they have not been. Politicians—not just on one side or even on just two sides—generate support for themselves personally and for the political class as a whole by converting them into partisan issues. Venkatesh Rao has written a very thought-provoking analysis of the current dynamics of the situation in https://www.ribbonfarm.com/2020/01/16/the-internet-of-beefs/.