You mean like showing them to be full of contradictions, bad logic and blasphemies?
Once their was a certain traveler who wished to make a purchase in a distant land. For payment he had a pearl he deemed to by of great value. He feared to show it to anyone lest he be robbed, or his pearl destroyed.
When he reached his destination after long travel and much travail, he presented his pearl as payment for his heart's desire. It was found to be only polished quartz, nearly worthless.
The moral is obvious: If your pearls are worthless, it is better to find out before it is too late.
Judgment is in the hands of the Lord. I am content.
I will point out contradictory premises or bad logic. I will stipulate that we have all been guilty of those. But when you have so invested yourself in ideas that you take an attack on those ideas as a personal attack, then you need to sign off and take the time to gain some perspective.
And that phenomenon can be recognized when we find that some of our ideas are "sacred" and so fragile as to fear exposure to the harsh light of reason. If we are not to fear the valley of the shadow of death, how much less ought we to fear the bright light of truth and reason.
One of the tested methods of conflict resolution is to demonstrate that you have correctly understood what your opposition has said. Only when you have satisfied your opponent that you have understood him do you deliver your refutation. And only when your opponent has demonstrated that he has understood your rebuttal is he allowed to argue against it. Of course most folks don't have the stomach for this kind of discussion, especially if they have not closely examined their own premises.
When steel meets the spinning grinding wheel, sparks fly. It is a sign that one or both is being destroyed. Truth is ever so much tougher than faith, that if truth is on my side I have nothing to fear. Admittedly, if my faith is pressed by truth, it is my faith that must be destroyed, and, if I have invested myself in faith rather than indestructible truth, the process would destroy not just my faith but my very self (if that were possible).
Or put it this way: Truth is the light of heaven and the fire of hell. You must constantly test your faith against the world. If the world destroys your faith it was not truth.