Yeah, I know. I was part of one of these groups back when I was younger. Even though I was looking for bits of corn in the pig slop to nourish my body with, the overall effect was negative and had to be broken free from.The OP was too black/white for me. Insert the word "some" or even "many" and I agree. But there are evangelicals who do try to live the message of Jesus and serve the "least".
In my experience, and it's hard to put all of that into words, there were ones which were sincere, but its hard to tell if its just saying all that rhetoric of what others said because that's what you're supposed to believe to be part of them, but in your secret heart you know it is wrong, or you're just an ******* who hides their dirt behind the name of Jesus, doing everything contrary to him and his teachings, all while praising him. These are non-spiritual people, using a tight frame of religion to hide their sins behind.
Those that have softer hearts and souls, may or may not be able to find their way free of them, so they may still be trapped in the disease of all that, which generally is reflected in the leadership. If I meet such souls, I try to encourage them to look to what their hearts tell them, and not be married to the idea you need to believe all the rest.