spathiphyllum
It is correct to say that many (actually, let’s be honest and say ‘the overwhelming majority of’) white people are offended by racism.
They are not offended ‘on behalf’ of someone else. They are offended that, in a white environment, racists tools assume that they Are ‘like them’.
Normal unbigoted white people don’t want to be associated with filth. They don’t want to be seen as being in the same bucket as the pond scum.
In that respect, they are honourable people.
There is a tiny minority of white people who are okay with racism, because they are morons.
However, they are very noisy morons.