Churchill on the holocaust:
>None has suffered more cruelly than the Jew the unspeakable evils wrought upon the bodies and spirits of men by Hitler and his vile regime. The Jew bore the brunt of the Nazi's first onslaught upon the citadels of freedom and human dignity. He has borne and continued to bear a burden that might have seen beyond endurance. He has not allowed it to break his spirit; he has never lost the will to resist. Assuredly in the day of victory the Jew's suffering and his part in the struggle will not be forgotten.

>There is no doubt in my mind that we are in the presence of one of the greatest and most horrible crimes ever committed. It has been done by scientific machinery by nominally civilized men in the name of a great state and one of the leading races of Europe. I need not assure you that the situation has received and will receive the most earnest consideration from my colleagues and myself but, as the Foreign Secretary said, the principal hope of terminating it must remain the speedy victory of the Allied Nations.

>The most bestial, the most squalid and the most senseless of all their offences, namely, the mass deportation of Jews from France, with the pitiful horrors attendant upon the calculated and final scattering of families. This tragedy fills me with astonishment as well as with indignation, and it illustrates as nothing else can the utter degradation of the Nazi nature and theme, and degradation of all who lend themselves to its unnatural and perverted passions.

Sources:
https://www2.gvsu.edu/walll/churchill%20and%20the%20holocaust.htm
https://www.nationalarchives.gov.uk/education/resources/holocaust/churchills-reaction/