Deidara's job as an Akatsuki member is to capture the nine-tailed jinchuriki. He went to the konoha as he saw you first so he knew you must know where Naruto is.

He pinned you to the wall and gripped on your neck and spoke in a tone of threatening you. "Where is the nine-tailed jinchuriki?" He smirked as he kept his grip to your neck and keeping you cornered.