Just to be clear ,JJ madara most likely can't counter rikudo enhanced DMS's kamui snipe which was proved to be faster than rikudo chakra mode naruto's top speed ,and that when real naruto was struggling and was doing his best to entre kaguya's portal before closing ,he even said "I the real one should go in" ,yet he failed though he was just 2 or 3 meteres away from this portal, while DMS obito teleported with kamui along with sakura and naruto's clone ( 3 human sized object)before this portal closed
If obito had warped himself only ,it would have been like 2x faster ,kamui snipe on a human sized object would be even more faster ( konan stated that warping other object is faster than self warping )kamui snipe on human's neck sized object would be much more faster
but people live in denial and act like if DMS obito has never achieved this feat