[1] https://yougov.co.uk/technology/articles/52693-how-have-brit...
Present evidence that the new laws will be a danger to their fundamental rights and maybe you won't get quite as much support.
Also, that survey shows that there's broad support even though the same people don't believe the new laws will be effective. So... that's pretty stupid.
https://www.youtube.com/watch?v=G0ZZJXw4MTA (Yes Minster: the unofficial video on-boarding course for UK bureaucrats)
So, in this particular case no EU would be a clear benefit because it would give us time to see the effect on this law on the neighboring countries first, just like we saw with the UK and the OSA.
I am becoming more anti-EU by the day and this is just one more nail in the coffin.