I'd welcome you, but not my neighbor across the street he hates my guts and I hate his.
Next time you have an oportunity strike up a conversation with him. Talk about TEOTWAWKI, and
encourage him to buy up lots of supplies! When things get tough you won't feel so bad killing him for them, and it saves you the money of having to buy them yourself. He may even devulge some usefull information about himself to you. At the least if you play your cards right he'll likely develope a little fear of you... Oh, is that cold blooded logic? Well, it's still logic. And if your not willing to be cold blooded you won't last anyway.
"Keep your friends close, & your enemy's closer"
This kind of thinking is why even if you DON'T like your neighbor, your wise to treat them politely (so as not to be #1 on
their list!)