Not at all surprising, actually. While many cultures have engaged in honour killings, most have abandoned the practice or are in the process of doing so (with one notable exception, of course).
It's VERY surprising to have representatives of a particular ethnicity denounce their own cultural practices while in a Western country. It's extremely rare, as evidenced by the endless bleating about 'tolerance' and 'diversity' that we are all subjected to.
In India, yes there is a significant and vocal movement to stop honor killings, but those who believe in such practices often move to the West, and in the West they have Leftist political organizations who will instantly rush to their defense. And that defense normally takes great pains to couch any criminality in terms of an 'aberration', and will scream "racist!" at anyone who dares suggest that it is or ever has been a cultural norm.