Yes when it becomes a public order issue.

Why? It is a public order issue not a Brexit issue.

we are correlating effect and observation. And laying down possible causes. Deny it and the situation gets worse. Fail to debate it and the situation gets worse. Politicians of all stripes jumped on one side of that one PAL!
We are not doing the hugely humorous equivalent of blaming God's (whoever she is) retribution on Trump for recent hurricanes. We are looking at everything and debating the most significant. Deniers will state "relevance" citing the virtue of the correlation with doubts over cast iron proof of cause.

Declare yourself. Are you a denier, a sweeper under the carpet or an objective pragmatist?

Brexit is not a simple issue. It affect more than tiny minds. Wait for food price hike caused by Global Warming compounded by Brexit/"value of pound" and deny either when it suits! But it won't make it go away.

When I was inventing stuff &/or programming (still am) and had to debug it, I never ever managed to solve a problem by denying it. Tried a few times, and it bit me.