[OneWingedShark]

Why can’t Christians accept the obvious: homosexuality is part of God’s plan. If it isn’t, why does it exist?

This is saying that sin is a part of God's plan — if sin is a part of God's plan [that is His will] then James is wrong when he says:

(James 1:13)
No one, when tempted, should say, “I am being tempted by God”; for God cannot be tempted by evil and he himself tempts no one.

[NetAddicted]

Awesome post!!