The question as written is extremely vague. Who is "they"?
If the "they" refers to Nazi Germany, then: They killed Jews in death camps and in the streets of ghettos. The Jews were either gassed shot or work to death in death camps or in ghettos but they weren't gassed to death in ghettos.
If "they" refers to the Spanish Inquisitors, Arab or Russian Pogroms, the Arab/Palestinian-Israeli Conflict, the Expulsion from Britain, among numerous others, the answer above does not apply. Each Anti-Semitic Murder event was perpetrated in a unique way and as a result, no proper answer can be given.
Why did who kill which Jews .
to kill all Jews to kill all Jews
I think they did to kill the Jews.
to kill the jews! da to kill the jews! da
Yes, they killed millions of Jews.
No, and Jews did not kill his mother.
The 'Final Solution' was the plan to kill all of the Jews under the Nazi yoke.
Currently, Jews are not facing a genocide.
The Jews helped kill christ!
To kill the Jews
No.
Jews