It's an interesting point and one I have been mulling over for months.
There are elements but only elements. Trump's trading philosophy is reminiscent of some aspects in the lead up to WWI but his isolationism isnt; WWI was about major powers being in alliance, not spurning them. It was also linked to ethnic self determination that had been denied for centuries, and that kind of thing exists only in tiny pockets now; Palestinians, Kurds, Catalans.
In terms of the rise of nationalism/facism priotlr to WWII again there are elements; particularly in Trump's America.
But the intent is totally different and I think that is important at this stage (it might not be later)
Trump doesn't have a fascist world view. His world view is that of a gangster or a despotic monarch. It is an ego centric world view. He will absolutely embrace people who hold a fascist world view to promote his own authority, but it isn't a view he holds himself.
Likewise, Johnson probably has elitist sympathies that might just about border on historic "betters and inferiors" eugenicism. But his aim is very much about staying in power. If he needs to placate the red wall to do that, he'll do it. If he needs to spend to do it, he will do that.
Johnson recognises that what you say is ten times more important than what you do. He can do almost anything he likes; he can destroy lives, trash job markets, scrap the NHS. As long as he tells people he has done the opposite, the requisite press echo that and then the boomers come out in force on facebook, he will be fine.
He learned this from Trump. Case in point;
View attachment 37710
So many Americans believe the growing cult of personality around Trump. They believe he was sent by god. I cannot begin to fathom how they can possibly associate anything Trump does as being related to the Bible. He is the opposite of Jesus's teachings in every respect and the embodiment of every single deadly sin. And yet, this is what he has built.
In that sense, yes, there are alarming similarities to Hitler, Mussolini and Putin and you can see some of that in Johnson's immunity to criticism too.
But the intent is not there. Hitler had the Blood and soil racial world view and pursued it. Trump and Johnson don't. They will appoint loyalists who keep them in power and it is to them we should look for a direction.
In this case, look at Dominic Cummings, as well as Patel, Raab and Truss. I loathe them all, but none are fascists