Christianity...Seems legit

[Major Nikon]

121. There is no biblical support for the holy trinity doctrine which came along long after the bible found its way to paper

So there really doesn't need to be any sort of argument against it, but rather it's incumbent upon those who support that particular doctrine to make an argument for it. Meanwhile there's numerous examples in the bible that defy any notion of it. Most Christian denominations subscribe to the idea in one form or another, but not all of them do.

So yes you can dream up all sorts of ways to find biblical support for most anything you want, including slavery. Make that especially slavery since the bible not only regulates slavery, but endorses it. You can certainly twist yourself into a pretzel figuring out ways to use the bible to support all manner of things like equal rights for women, even though the bible regards them in the same way as livestock.

That still doesn't change the reality that the bible is far better suited to support those bad behaviors.