You tell him.
Crossbreed, Mongrel
Yes. Continue to rely on other people to say things, as you never have anything of substance in your posts.
I also find it pretty offensive to refer to any person as a "Crossbreed, Mongrel." You're quite a small minded little fat man, aren't you?
Just in case you were wondering, here's how Mongrel should be used:
mon·grel
noun
1. a dog of mixed or indeterminate breed.
2. any animal or plant resulting from the crossing of different breeds or varieties.
3. any cross between different things, especially if inharmonious or indiscriminate.
Not typically used for people, except by complete fucking backwoods bastards. You have already stated that you think racial blending will destroy civilisation, but it won't. And you can't find anything that proves it will. It has been happening for hundreds of centuries.
Honestly, what the fuck is wrong with you?