photo credit: Luke Reuters on Twitter
I would note that where Feiglin is walking in these pictures is right outside the Dome of the Rock and is an area where most people who ascend Har Habayit do not walk.
It is not my place to explain or justify what he does, but in an attempt to clarify - Feiglin is walking there using the din of "kibbush". Meaning, the normal restrictions of where one can walk on Har Habayit are waved for the need to conquer the area. Out of necessity. The gemara also talks about people entering the heichal in unusual ways for the purpose of maintenance.
I have been up with other people who have said we go up as conquerors and can walk there, and they did, but most ascenders avoid that area. I admit, I have been tempted to do this as well, because I think at least part of what we do by ascending and showing presence has an aspect of kibbush, considering the situation, but so far I have not actually gone there.
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