People have said this since 2016 before the child separation shit. He constantly alludes to it as well:
Outrage online as campaign calls accusation 'moronic'
www.independent.co.uk
The latest in a series of allegations of dog whistles and outright white-nationalist messages from Trumpworld comes in the form of an $88 baseball.
www.businessinsider.com
The really scary thing is that we pretend that Hitler was always universally loathed. He was very popular not only in Germany but also in the US (look at this pic of MSG

)
The other scary thing to me is that Trump got around 25% of the Jewish vote and around 28% of the Latino vote