God and jealousy

It always struck me as a bit odd that God was described as a jealous God. Doesn't that smack of insecurity? What could God possibly have to be jealous about?
Somewhere in the back of my head, there's the concept that there is only one God, and he goes by many different names. It's the classic all roads lead to the top of the mountain. So whatever name you call him, it's the same reality.
Except the Bible assumes the existence of other gods. Why else does God warn against having no other gods before Him if they don't exist? (Note, this doesn't have to mean they are as powerful).

But what Jarred said about some Pagans being eclectic got me thinking. Do Pagans believe in their gods as separate entities, or as human constructs? And if they are independent entities, then are they happy to share a believer with another god?
Suddenly the idea of God not being prepared to share believers with another god makes more sense to me.

welcome to any Pagans

There's been a fascinating discussion over on Matt Stone's blog about how Christians should (or more to the point shouldn't) deal with Pagans.
My own experience of alot of Christians is that they are actually terribly insecure about their own faith, and worried that it won't stand up to any kind of questions from someone of another belief system. If you couple that with the standard evangelical concept that if you do not believe XYZ, then God will fry you in hell forever (because he loves you so much, of course!!!) and that if I don't tell you this, then when it happens it will all be MY fault (and what terrible things might God then decide to do to me????) you end up with a recipe for serious neurotic guilt.
I have enough problems feeling guilty about stuff that I am not responsible for - I've had depression for the past 20 years - and have had to learn NOT to take responsibility for things that are not my problem. Consequently I don't buy in to the above.
So, to be clear: I am a follower of Jesus, but I don't think it's my job to convert people. I love talking God-stuff with anyone daft enough to want to. I know very little about Paganism, but love hearing people's stories about their faith journey. So - maybe we can start exploring together?