I'm not sure I quite follow what the disagreement is here...
To me, election is simple: God has chosen, before time was, those who are to be His people, His worshippers, believers, the saved. He brings them into this world and then works in them to bring about salvation and form something in them which is for His pleasure.
We don't know who God has chosen, beyond those people who we know are believers and can point to as elect, as being in Christ. So why is the doctrine of election (or predestination, as I believe it's also termed) so contentious?
I can see one problem with it, and that is when it's brought into the gospel. The doctrine of election has no place in the gospel. C.H. Macintosh established this very decisively in his writings in the 19th Century, and I should hope that all intelligent believers wouldn't look for its inclusion or have an issue with excluding the doctrine of election from the gospel.
That said, could someone explain to me in simple terms for this bear of little brain, what the problem is? :help