So being born again is a great change in human nature?
Racism. You made a derogatory generalisation about Jewish people.
Wait I thought you said when we are born again our nature changes. Isn't being saved a great change in our nature?
The presentation of God as approving the murder of women and children on the basis of their membership of an ethnic group is perhaps an example of racism although it may have had a religious basis in which case God is a bigot.
That's an excellent example of faith, and also the universalist position most Christian communities have practised.
The first statement is not racist if you can prove their are still headhunter tribes in new Guinea (IIRC there are not, the Australian administration took pains to eliminate the practice in the middle of the 20th century). There are still headhunting forays reported among the Dayak people of Borneo IIRC. If your statement was along the lines of "they are still headhunters, its in their nature as black tribesmen" then yes that's racism.
The second statement is textbook racism. Can you tell the difference between a pejorative generalisation based on membership of a group, and an observable and verifiable statement?