how to understand this sentence

lily88888UID：2828533

We should not disapprove of the unearthing of truths that we would rather not acknowledge or that, by their dissemination. might influence society in pernicious ways.

Is "or" a miss printing, should it be "of"

duijinxiaoziUID：2585955

truths that we would rather not acknowledge or that【, by their dissemination，】 might influence society in pernicious ways.
结构：
truths that {从句一} or that {从句二}

lily88888UID：2828533

I see. Thank you so vey much.