Mein Kampf is an important document for understanding one of the most significant and tragic events in history. Only the truly ignorant would try to remove it.
Hardly that simple. Germany had banned publication until 2015.
Notably not under German law against extremist propaganda, but through copyright law, also affecting some international printings of it. Which explains the date of 2015: 70 years after the death of the author.
Unedited/-commented versions were put on the index later (which e.g. forbids advertising them in Germany, selling to minors, ...)
While I haven't read either, I expect that Mein Kampf has more historical value than the COVID book in question.
Books about about Covid-19, whether truths or conspiracy theories, can be reasonably expected to bring in profit.