Do you have references or corroborating evidence?

In 1992 a statue was erected to Harris in London, it was under 24 hour surveillance for several months due to protesting and vandalism attempts. I'm only mentioning this to highlight that there was quite a bit of push back specifically calling the gov out on a tribute to him; which usually doesn't happen if the person was well liked... not as an attempted killshot.

Even the RAF themselves state that there was quite a few who were critical on the first page of their assessment of Arthur Harris https://www.raf.mod.uk/what-we-do/centre-for-air-and-space-p...

Which is funny and an odd thing to say if you are widely loved/unquestioned by your people. Again just another occurrence of language from those who are on his side reinforcing the idea that there is, as you say is "very controversial", and maybe not a "vast majority" since those two things seem at odds with each other.

Not to mention that Harris targeted civilians, which is generally considered behavior of a war-criminal.

As an aside this talk page is a good laugh. https://en.wikipedia.org/wiki/Talk:Arthur_Harris/Archive_1

Although you are correct I should have used more accurate language instead of saying "considered" I should have said "considered by some".