Earlier quoted context omitted.
All of our current leaders as using God to justify their terrible actions. So religion doesn’t seem to be very good at teaching morals either.
Either god is me (secularism) or god is something outside me (Christianity). One is going to be better than the other. It matters which one. Everyone has an answer, and it affects your morals. Whether or not you are consistent brings you back to that same question: “who says?”
Only people can say things. And following people that start by lying that they have unique and superior insight into what things ought to be is not a good strategy. Secular is just saying, we are all in this together as equals, let's figure things out, here's what we got thus far.