Sidi, standing for the Prophet s.a.s. is already a matter of difference. And most notably, the people who like to differ are the Deobandis, while all others, including people from other Madhahib, have allowed this. Do not turn this into a war, because it is already a matter of difference. If someone thinks it is fard to do so, then he is mistaken, but otherwise, there is no reproach on anyone who does it.