Your Dad's group is one example. But it doesn't own or define who the Evangelicals are.

"Evangelical" refers to a theology. How a group expresses that theology varies.

Regarding the Evangelical Left:


Typically, members of the evangelical left affirm the primary tenets of evangelical theology, such as the doctrines of the Incarnation, atonement, and resurrection, and also see the Bible as a primary authority for the Church. Unlike many evangelicals, however, those on the evangelical left support what are often considered progressive or left wing political policies. They are often, for example, opposed to capital punishment and supportive of gun control and welfare programs. In many cases, they are also pacifists. Theologically they also often support and utilize modern biblical criticism, whereas more conservative evangelicals reject it.

While members of the evangelical left chiefly reside in mainline denominations, they are often heavily influenced by the Anabaptist social tradition.

https://en.wikipedia.org/wiki/Evangelical_left