If Hindus do not go to temples after eating non-vegetarian food, do they know intuitively that eating non vegetarian food is bad and still eat it?

 Your question is an immature question.

1. Hinduism reached its peak with heavy rituals which consisted sacrifices, in few cases, human sacrifices. The Shramanic Regions advocated non violence and non killing. Everywhere in subcontinent was in revolts, kingdoms captured and Brahmins executed. ( 2CE).
2. During revival (5-7CE), with Bhakti Movement, Sri Vaisnavism packaged itself with inclusion of all communities and adopting non killing to compete with new religions.
3. You may watch a tamil movie “Oru Kidayin Karunai Manu” (A sheep’s mercy letter) a national award winning film- to understand better. Yes. Hindus do perform animal sacrifices, cook and eat it in temples.

Is the question valid? Or

Are you living in vegetarian paradise?