"A blood oath"<quoted text>
That's a warped description. Very warped. Let's start with "Grace".
What is grace? Grace is divine love bestowed freely upon people. Eternal favor and love from one who is not required to give it, but does so anyway. We are saved by God's grace. Jesus' death on the cross was a blood oath that we are saved by God's grace. When a gift is given, it's up to the recipient to decide whether or not the gift will be accepted. If we truly appreciate the gift, we want to give something back. What can we give an omnipotent God that he doesn't already have? Our love and our loyalty. That requires thought. It requires that we think about our actions and how they affect others.
Out of that appreciation and deep thought springs forth a new desire to serve others. In that service, we can donate our time, our money, our energy, our talents. We don't do it for publicity. We do it because the unfortunate need it more than we do.
Are there crooks and scammers in our midst who would like us to believe they're true Christians? Yep.
Are there self-righteous bigots who think they're holier-than-thou and everyone else is going to hell in a hand-basket? Yep.
What does that show?
It shows that people with less than honest intentions can misrepresent others in relation to a specific group.
Does it mean the entire theological basis of Christianity is false? No.