To thinking,
You are correct, there are many poskim who claim there is no obligation to tear kriah because we do have political sovereignty over Yerushalayim. As you see from the posts, there is a serious difference of opinion as to what degree of control is necessary to negate the obligation of kriah. Almost unavoidably, this argument quickly deteriorates into a highly unproductive pro-zionist vs. anti-zionist argument.
Of the poskim you cited, the most interesting one is that of the Chazon Ish (I have not seen this psak for myself, I rely on you). This would explain why I rarely see someone in or near yerushalayim having torn kriah.