killing all the jews would be like removing a cancerous tumor from the patient ... if that solves the problem great ! but usually removing the tumor doesn't cure the cancer.
even so removing the tumor can prolong the life of the patient and may be worth it even if the cancer is still terminal.
although we think of cancers as tumors they are actually caused by mutations which are themselves caused by viruses ( or vaccines ). the Jew biomass ( the 16 million Jews one earth today ) is just the final form manifestation of the virus that is the Talmud. converting the biomass into soap doesn't eradicate the virus.
hopefully the last 3 years have taught us that fighting viruses is a complicated matter and it's too easy to cause more harm than good with knee jerk reactions.