Here's an odd one...
Yitzchak Meir Malek posted this video of him singing Shema Yisrael as a call to prayer on his Facebook page, where it has received over 10,000 shares, 9,900+likes and 1,400 comments thus far.
He's also posted a news article about his singing: WATCH What This American Israeli Singer Did To Teach Muslims A Lesson About God And Jerusalem.
Setting apart the question of whether this is an appropriate response or not, here is a larger issue here. Nowhere in the post or article does it indicate that it's not his voice. An awful lot of people have commented complimenting him on his voice and he hasn't acknowledged it there either, as far as I can tell. It's pretty dishonest for a singer to put something out, representing or implying that its his singing, and not clarifying that it isn't him, when so many obviously are taken in. It is insulting to his listeners, to all of those vocalists who work hard at their craft, and, of course, to the singer whose work he lifted without attribution.
Here's the clip he used, which was posted to YouTube in 2007. The singer in the track is unidentified.