No-go zones around Christian churches for vehicles that don't belong to members (members must be thoroughly identified and background checked before being accepted as members, no fake Christians allowed.)
Who do you propose will pay for all this manpower to run the checkpoints and do the background checks? And what, pray tell, is your definition of a "fake Christian," besides yourself?
Islamic suicide bombers trying to infiltrate.
Armed volunteers from the churches would run the checkpoints, security, ...and special divisions within the churches would do the background checks.
Better than doing nothing, being sitting ducks, and getting blown to bits in your own church by Islamic terrorists.
There are fences, and locked gates during school hours around Jewish schools in Sydney...armed guards at the gates.
How do I know?
I, in a white van, mrs arafura on board, took the wrong exit off a roundabout one day...the only place it went was to the front gate of a Jewish school.
The armed guard, six gun visible, looked very suspicious of us. He wasn't smiling.