As background: in a country that prides itself on its women's rights and gay rights records -- including in the IDF -- Rabbi Rontzki  has argued that women should not serve in the IDF ("The idea of girls going into tanks or into paratrooper battalions is an impracticable one in my opinion and could hurt the combat array") and has taken aim at gays in the IDF. 

He and his colleagues have also been accused of brainwashing IDF troops with religious-nationalist dogma, and Rontzki was the central figure in what seemed to many like an effort to turn the recent Gaza offensive into a Jewish religious-nationalist holy war (you can watch/hear him blessing the troops here, courtesy of the settler media outlet). 

In his free time, Rontzki reportedly goes into jails to spend time with Israelis associated with far right-wing groups who have been convicted in right-wing nationalist crimes (like attacking or planning attacks on Palestinians)...

This trend in the IDF religious leadership dovetails in a very worrisome way with demographic trends in the IDF ranks.  For what this could mean to Israel's future, check out the Hudson Institute's Meyrav Wurmser writing on this topic back in December 2007:

[in the event of a peace agreement of some kind] "...the IDF may have difficulties carrying out its tasks. One group of growing influence inside the IDF -- religious nationalist soldiers -- may refuse to carry orders that call for evacuating their own homes and families from the West Bank.

"This apprehension has given birth to a debate over whether the military can rely on the religious nationalist soldiers, who reside in West Bank settlements, for this undertaking. This is not a marginal concern. Unlike the ultra-orthodox, or the Haredim, who do not serve in the army out of religious conviction, the religious nationalists have served in the IDF since the early decades of Israeli statehood.

"In recent years, members of this camp have begun to volunteer for the most demanding and dangerous combat units. They now serve in disproportionately high numbers in the IDF's elite units and in its combat officer corps. Though it is difficult to ascertain how many of the soldiers and officers in the IDF come from the national religious movement, Bar Ilan Professor Stuart Cohen estimates that during the second intifada (2000-2002) the overall number of religious Zionist soldiers -- as defined by those who wear knitted caps, or kippah seruga -- in the infantry units may be roughly twice their proportion of the Jewish male population as a whole. According to other estimates, more than 50% of the elite combat units now are drawn from the religious nationalist sector of Israeli society..."