While people are trying to persuade Iran not to attack Israel, while negotiations for the release of the hostages and a ceasefire are on the brink of coming to a head one way or another, Ben-Givr took 1,500 Israelis to pray on the Temple Mount in a clear infraction of the law.
Presumably he wants a full-on war with Iran, to leave the hostages to gradually die or be killed, the war with Gaza to continue, and to show the Israeli government that he is in charge.
https://www.jpost.com/breaking-news/article-814514