You have to read the whole article, you can't just skim the headlines and think that you are informed.

"The more vaccinated a population, the more we'll hear of the vaccinated getting infected," Jetelina wrote, noting that 85% of Israeli adults were vaccinated at the time. If there were four COVID cases out of 100 people, for example, with two occurring in vaccinated people and two occurring in unvaccinated people, that would be 50% of cases occurring in vaccinated people.
But the more important number to look at would be infection rates among the separate groups -- which would be a 13% infection rate in the unvaccinated, and a much smaller infection rate of 2% in the vaccinated.

That would strongly indicate that vaccines are working.