In the eyes of the nazis, what were the weaknesses of the Einsatzgruppen

It took much longer to kill very large groups of victims with the gas vans, however. Einsatzgruppen personnel were required to remove bodies and clean the compartments.

Explanation:

Throughout the German occupation of seized Soviet territories, mass shootings continued to be the preferred method of murdering Jews. At least 1.5 million and possibly more than 2 million Holocaust victims died in mass shootings or gas vans in Soviet territory.