doesn't make sense to quote koran without hadith. hadith is like oral islam. koran is only interpreted through hadith by legitimate muslim clerics. So some verses are actually negated by hadith. their oral law system can discard certain verses of koran. And anyone who tries to shows you koran verses is probably a fraud trying to pass off abrogated verses as if they are Islam.
The whole "there are moderate muslims and a peaceful islam" crowd tries to use this fraudulent approach to pretend that islam is friendly. You can point out that hadith has discarded koran verses, but they should already know that. So I think the best strategy is to simply combat the evil islam.