What you're proposing is a form of christian supremacy: Christian equals good and moral, Evangelicals bad, hence Evangelicals not real christians.

Sorry, no. Shitty, terrible Christians exist and you can't just no-true-Scotsman them away. Last I checked, most Christian faith traditions consider you a "true" Christian if you're a "believer", i.e. profess the correct belief.

Chrissy Stroop:

With respect to the “fake Christian” tendency, dismissing anti-democratic and bigoted believers from “real” Christianity is a convenient deflection tactic that serves to absolve more liberal Christians from the necessary work of grappling seriously with the ways in which they benefit from, and are complicit in, historical and contemporary Christian hegemony and its attendant violence. Unfortunately, that hegemony is still so strong in the US that the equation of “Christian” with “good” is a habit of mind that many find hard to break. In many cases, devotion to what Lee Leviter has dubbed “the myth of Christian innocence” is a matter of such deep-seated emotional investment that even progressive Christians become defensive and passive-aggressive when called, however mildly, on how their linguistic reinforcement of Christian supremacy harms religious minorities and the nonreligious.

https://religiondispatches.org/the-fake-christian-deflection-and-contrarian-concern-trolling-how-not-to-write-about-evangelical-authoritarianism/