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This is a carefully crafted article. The author subtly shifts from baking a cake for a gay person, to baking a cake for a gay marriage. If you miss that shift, you may get the wrong impression of the article.

Then why the "Barf alert"?

[HiTech RedNeck]

Because an assumption has been made about what it’s trying to say.

What it is actually saying is that it is okay to furnish good things to your enemy, but not bad things. Bad things are things that are purposed to further his sin.

This concurs with a freedom of speech standpoint. If you want a blank cake, here Mr. and Mr. Gay you may have it. If you want me to inscribe it to your unholy union, sorry Mr. and Mr. Gay, I refuse.