If you are insulted, it is the Church that is insulting you, not me. The Church placed certain books on the Index because they could lead the faithful into error and endanger their souls. It is a bit more than “sending someone to pieces”. We are all obliged to avoid near occasions of sin, and for those who need to avoid reading error and heresy — whose faith, intellect, or will is not strong enough to resist being led astray — certain books should be avoided. If there is some need to read them (academic obligation, knowing the errors in order to refute them, etc.), then that is one thing, but for a weak and struggling person, possibly at a confused place in their life, and liable to be led into error, heresy, or moral degeneracy, it is better to avoid such writings.