Whaaaaat?
Why?
In fact, why would we not if the national opinion appears to have changed?

Brexiters saying there can't be a second vote sound awfully like double glazing salesemen telling a previously underinformed and grievously misled old lady that it's too late to change her mind, she must pay, it's the law.

(It effing isn't the law. The law is entirely silent on the matter).

Saying we can't have a vote is completely undemocratic. What you're saying is that democracy ended in June 2016. People have the right to change their minds, that's a part of democracy. Not allowing that is totalitarian and fascist by it's very nature. These apparent democratic countries we live in are supposed to represent the democratic ideal not be dictated to some brexit bully boys who are going to lose their investments!