Fallacist's/Fallacy fallacy

argumentum ad logicam


Description:
The argument A for the conclusion B is fallacious.
Therefore, conclusion B must be false.

Example:

Christine: God does not want us to discriminate because I don't want to believe God would!

Jack: You're logic is flawed. Wishful Thinking. Therefore, God must want us to discriminate!

Related Fallacies:
Bad Reasons Fallacy


Side Note:
Do not make this fallacy. It makes you look stupid when committing a fallacy whilst accusing another of doing so.