could you provide some examples of what you are referring to here?
Propaganda has been very strong the last few years, and people feel like defending racism is actually some sort of legitimate fight because they actually believe that things like Antifa, Social-Justice-Warriors, and government bans initiated by progressives are real organized things. They are invented ideas and tools used by propagandists to keep people divided and working against the interests of other Americans.
Did you even go through this list?
http://www.ala.org/advocacy/bbooks/frequentlychallengedbooks...
Most of them might be "banned" in a few select conservative/christian schools and that's it. Come up with actual examples of the things you are claiming or stop fear-mongering.
Also, being tolerant to intolerance breeds autocratic and non free societies. A lesson mankind seems to have to learn over and over and over again. My children will be taught that you do not suffer the Nazi, the Communist, the self-righteous conservative calling for a ban or the SJW.