Cameron said that if we leave the EU France and other countries will punish us. So what does he think of the morals of this mafiosa type organisation.
Are his thoughts on their morals remotely relevant? Surely it's the
consequences of their actions that are going to hurt the UK, regardless of whether they have good/bad reasons for them... Even if they had the worst reasons for acting you could possibly dream up, the effects of their actions will be just as harmful as if they did it out of love and kindness.
It is perfectly understandable that the rest of the EU will seek to "punish" the UK for leaving so as to slam the door shut on other countries going down the same path. And with so many EU-related things requiring a consensus of all EU countries, it only takes one out of the remainder to give the UK a bloody nose for having "messed" with the harmony of the EU.
And that has real, tangible consequences for the UK economy, freedom of movement, job prospects etc.
(It's this same unanimity that has destroyed the Greek economy because the EU had to keep going round and round and round until the austerity measures were draconian enough to get the agreement of EVERY single country.)
Not to mention that as soon as the UK invokes Article 50, they're effectively going to be "sent out of the room" on negotiations that affect other EU countries, since the EU won't allow a leaving member to affect laws that they won't be subject to by virtue of having declared their intent to leave.
Is any of the above nice? No.
Is any of the above "fair"? Arguably not.
But it's the reality we live in, and to deny that reality is the equivalent of sticking ones hands over one ears and going "la-la-la" until the monster goes away.