Hithnagdut involves opposing the spiritual worship of others.

Disrupting the Prayers of Others It is a grave sin to purposely confuse and disrupt someone who is praying with devotion, even if this person did not reach Tikkun Habris and this is therefore a consequence of his actions. Nevertheless; the, opposer will be punished since he is choosing to uproot himself from holiness and is classifying himself as a manifestation of a 'Brazen Dog'.[1]

[1] Hishtapchus Hanefesh 71