Original brainchild for Lebensraum explicitly points to Manifest Destiny: https://encyclopedia.ushmm.org/content/en/article/lebensraum. You can slap "lebensraum" and "manifest destiny" into google and also see the results for yourself. I admit say I'm not a well of primary nazi sources if that doesn't satisfy you.

Zyklon B was used to "delouse" Mexican immigrants at the southern border before it was ever used in Nazi death camps.

IBM built the computers that Germany used to track their Jewish population.