It's not offensive so much as you're generalising from personal experience to assert that Christian friendships are somehow qualitatively different from friendships as found in the Kabbalistic or Western Buddhist traditions, which is clearly a ridiculous thing to say.

If "hipster" engagement with faith is superficial or driven by fashion trends, there's nothing special they'll find in Christianity as compared to any other faith structure that will make the experience of engaging with that faith any less ephemeral or inauthentic.