chief,
I would not fully discard the theory that it is Zionist fault. Of course, arrivals of so many people trying to establish a state ignited opposition.
But this has to be balanced against the real need to save Jews, both physically and spiritually, from the dangers of Europe and later Arab countries and USSR. Was Uganda an alternative to create a safe place for all Yidden and keep EY for only a small religious community? Possibly. But then everyone who hold by 3 shevuos should have spend their energy looking for the right Uganda, As it stands, Zionists saved lots of people, and RZ influenced them to the degree they could.
In some cases, Zionists under-performed because of their ideological bias. for example, starting mid-20s, they consolidated funding via sochnut instead of previous private efforts. As a result, money were directed to kibbutzim – both to hold the land and to propagate the “way of life”. Kibbutzim always required support, as all socialist enterprises anywhere … The alternative, previously advocated by gevirim, was to invest in the manufacturing base in Tel Aviv – that was creating jobs. As a result, many in Europe, including Germany, were reluctant to come because of the lack of jobs.