Nope, it was EU. the EU wanted to wait for final, concrete results before mass adoption.
The EU was very skeptical regarding the vaccines. the EU wanted to perform bulk orders as a union which complicated the ordering process.
The issue is not necessary the number of vaccines but the entire infrastructure to ship, cool and vaccinate people.
Israel had good existing infrastructure, willingness to pay up-front and high demand for the vaccine.
* will note that Israel also agreed to share vaccination data with Pfizer to locate any anomalies\problems