Tekka is referring to Kylo Ren's heritage, being the son of Han Solo & Princess/General Leia, and nephew of Luke Skywalker.
"Where" in this instance is not about a location, but of character and substance of his family's legacy. Tekka, not directly responding to Kylo Ren's statement, instead takes a shot back at Kylo Ren implying that Kylo Ren is fooling himself, insinuating that Kylo Ren is pretending to be something he is not.
To paraphrase Tekka: It doesn't matter what you think/say you want, because I know whom you really are.
One has to remember that Lorr San Tekka is also a member of the Church of the Force, whom believe in the practices and restoration of the Jedi Order.
A good chunk of the sequel trilogy is debating if there is redemption for Kylo Ren and/or if Kylo Ren's philosophy has any justification. This scene just plays on the contention of such a debate.