OP,
So your pathetic husband is putting people he thinks are trying to intimidate you, ahead of you?
He really is pathetic.
Stop trying to persuade him.
TELL HIM what is happening.
Tell him how unattractive his behaviour is.
In your place I would definitely move on the fencing.
Also buy a sail cover that can be erected to block their view, amazon sell them for sun cover, but they are super for privacy too.
Also buy a small radio that you can play speaker facing their direction on a low basis which will block out or make difficult their ability to ear wig your conversation.
Don't brook any arguments or bullshit from your husband.
The sail can be quickly erected and taken down, you could even plan a pergola structure.
Bamboo is fab, especially the tall growing varieties, BUT plant in plastic containers as they spread!
There is nothing nicer IMO than enjoying privacy in your garden, particularly early mornings when you might enjoy early morning coffee in your dressing gown, having fallen out of bed😱😁.
I also love a glass of wine on a summers evening and I certainly wouldn't like my neighbours peering in at me.
Even more so if I didn't like them, which fortunately I do!...
Your husband is the weirdo.
I have never met anyone who didn't prize their privacy.
We bought our old house that needed loads doing to it, including a hugely over grown garden.
THE selling point of the house WAS the large hugely private garden.....it certainly wasn't all the work we had to do in the house!🙄
Stick to your guns.