The percentage of Brits that voted leave was much smaller than 66, but besides that a lot of them feel lied to, because none of the promises the leave campaign made were held up. For example when it comes to foreign workers, there was a huge shortage of lorry drivers and medical staff after Brexit because most of the eastern-Europeans left the country. So to mitigate that problem there are now a lot of south-east Asians and Nigerians immigrants doing those jobs and so the Britons that voted leave now live in a country with more immigrants rather than less. Thats not the only reason leave voters are disappointed, and I believe the fear of immigrants moving in is now much smaller than the fear of isolation and impoverishment.
Also the conservatives have lost a lot of credibility (and votes) because of how they got Brexit done, and the far-right lost a lot of credibility (and votes) because of their ties with Trump and Putin.
Polls show a serious majority wanting closer ties with the EU, militarily and economically.
I agree a step in the right direction, and I think better late then never. But I think it's more a message than anything else. "The Dutch government will now assess exports of military equipment and dual-use goods to Israel on a case-by-case basis, ..."