I have never heard of anyone reciting salawatayn like that. Maybe it's sufi/khawarijjs who do this?There is nothing wrong with that it's just a durood session why are you trying to make it out as some sort of joke by calling it protestant islam/singing hymns?
You can technically read it however you want as long as your not intending to make a mockery of it. I don't think they are trying to mock it and there probably sufisI have never heard of anyone reciting salawatayn like that. Maybe it's sufi/khawarijjs who do this?