n0m, you’re take on Satmar, Gur and Tsanz is partly wrong and partly shallow. According to what you write, if at one stage someone is hungry and then later he is not, that is a change of view. it’s not. It’s just a change of circumstance.
WWII wreaked havoc on those communities both physically and spiritually, and they had to rebuild in both areas. Where before they war they may have concentrated on one aspect, after the war they had to concentrate on others. That’s not a change of view, it’s a change of action to reach that view.
And when it comes to Lubavich you write that the voices of the previous rebbes are still heard. Are you really saying there’s no change? Before the war was Lubavich focused on outreach? Did they talk atout Mashiach as much as they do now? Of course not. Now the former could be a matter of adjustment, but not the stress on Mashiach.
As to your rhetorical question as to why the Lubavicher rebbe was involved in a number of things: I know nothing about him “wasting” resources on Litvish yeshivos or his helping opposition kashrus organizations, so I can’t comment. His “helping” Israel always seemed to me to be dictating what they should do, i.e. pushing his own view as the only correct one. And he shied away from so many controversies – not all – because he wanted to be able to be accepted by all sides.