I agree that if your conscience condemns you it is sin for you. Familiar with the verse, thanks.
But if assuaging the deceived conscience is sin, then Paul is guilty of doing so when he writes that all food is clean, and that observing all days alike is just as well as a particular day. To attest that convincing someone of the error of their conscience is wrong is to call scripture evil, because scripture does exactly this when it convinces of sin and when it comforts those in unwarranted terror.