When would a Buddhist want to attach? I understand that Buddhism is meant to end sufferings. The Buddhists welcome everything and don't clinging when it's gone. They don't necessary cut existing attachments (knowledge, relationships), but they don't necessary seek to strengthen them. However, is there a case that a Buddhist wants to attach?
The teachings has always been about detachment. 

Therefore, assuming when you mention Buddhist means "one who understands the true context of the Dharma AND practice the teachings skillfully", then the answer will be No. There will be no case for such one to want to attach.

And to clarify any doubts - practicing something does not equal to attaching to something.