Trump is as racist as the day is long. His entire history shows it. His current rhetoric and policies show it. Anyone saying otherwise is either a moron or a troll or both, and not worth engaging with.
Trump's racism seems infinitely simpler and more obvious than that of our lot. He's always been pretty clear that he thinks white Europeans are a superior race. He's just a very straightforward racist. Nice and simple, at least.
With Sunak and Braverman and Pritti Patel and the rest of our multi-ethnic-yet-ferociously-xenophobic leadership it seems it's a complicated mix of racism and plutocracy - it's only _poor_ foreigners, and persons of colour, that they appear to dislike.
My tentative theory is that they feel personally _embarrassed_ by the existence of _poor_ non-white people, as if they fear being associated with them. The insanely high £40k threshold for bringing a spouse into the country seems to exemplify that - seems to make it clear they want the country to be exclusively for the rich.
Plus there's something complicated going on, particularly with South Asian migrants who came here via Africa, as the British Empire used them all over the empire as a useful administrator and business class (as actual white Englishmen tended to swiftly keel over with malaria).
It seems partly like the revenge of the British Empire (the Empire strikes back!), in that the same colonial bourgeois class who helped keep the natives down on behalf of the Imperial elites, are now employed to perform the same role with respect to domestic UK politics (including having authority over even white people, if they aren't rich) as they used to have overseas.
The US right seems to have gone for a much simpler model - just put an openly white supremacist white guy in charge.
As far as Ukraine goes...yeah, why should America get involved when a dictator starts invading neighbors in the name of sovereign security....we never should have gone over to Europe in WWII for instance. We should mind our own business! /s All the old school Conservatives are rolling in their graves at the thought of letting Putin's Russia getting a free hand by the USA, and specifically by the GOP, when once the USSR was the big enemy. Guess what Putin would like back... My how things change.
Though the US was far from of one mind in 1939-1940 also. There is that alleged Churchill quote "Americans can always be counted on to do the right thing…after they have exhausted all other possibilities.". The US sometimes finds itself on the right side by accident.
(Typically, when I look into it, it seems it's unclear who really said it, and it probably wasn't actually Churchill - seems as if that's _always_ how it turns out with clever quotes)