Can you show me an example of where Christ tore down the faith of a person who was not from his own faith?
The term "tore down" is vague and ambiguous. I presume when you use it, you mean "condemn."
If so, there are numerous passages which renounce all faiths other than the one proclaimed by Christ. You can start with the ones listed in my previous post HERE. From there, you may want to carry on with a good topical Bible, or a good concordance, or any of the Pauline Epistles (starting with Galatians), or Jude, or pretty much the entire book of Revelation.
Can you show me an example of where Christ tore down the faith of a person who was not from his own faith?
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The woman by the well... John 4:7-30
Jesus said to her, “Ye worship ye know not what. We know what we worship, for salvation is of the Jews...” John 4:22