Ches(Joe), drei nit ken kup.
Lesschumras, a lot of your accusations are unfounded and stated disrespectfully. In many situations the Rabbonim did not have the power to do things or it was impossible to know how the things would turn out. The Germans almost got to Eretz Yisroel and Rabbonim coming to America would not have helped. Ridvaz did come btw and left after he saw he was powerless to stop what was going on.