Forget about hashkafas, these are excuses. The average person does not think about hashkafas in his daily life. A devout Jew puts on tefillin every morning and does not think about whether he believes in the State of Israel. I grew up MO, and still consider myself attached to that world. However, there is no question that I do not feel a connection for one reason – they are not interested in adherence to mitzvoth. I visit my brother I cannot go to his shul – you can see the women dancing on the other side of the mechitza (without having to look to hard), they are given the sefer Torah to walk around with while wearing miniskirts and not too much more on their upper half. How many make brachos when they eat, etc.
I came to Israel expecting DL to be Mercaz Harav where they are strict in adherence to mitzvoth but happen to dress differently and feel differently about the State (even though I find the argument irrelevant today). To my chagrin, Mercaz and co. is a small number – the average DL woman has half her hair uncovered, slits in the skirts, etc. How many homes have TV’s and unfiltered internet. Even the chareidim who do, they know that they should not be doing so, with DL they see nothing wrong with it.
The level of spirituality to me was a great disappointment. By and large DL in Israel is more or less MO in USA. One who wishes to lead a life of Torah and Yirat Shamayim, whether he likes it or not, must throw in the towel and join the Chareidi world. I myself still dress not so Yeshivish but my boys have gone to Chareidi Yeshivos, my girls to Seminary in Jerusalem, and I am extremely proud.
The hashkafa excuse is a big bluff and in my neighborhood there are “serious” kippa sruga people who are treated with respect, given aliyos, invited to simchas and feel very much a part of the community. The issue of the state is irrelevant and once a year they may go daven Shacharis somewhere else – big deal. The rest of the time they join regular Chareidi shuls.