Kehte hai oont jis ped ki chhaya ke neeche vishram karta hai usi ped ke patte khane lagta hai. Shayad isiliye oont ko Mangal bad ke saath link kiya gaya.
They say the camel rests under the shade of a tree and then starts eating the leaves of that very tree. Perhaps this is why the camel is linked with Bad Mars / Mangal Bad.
In Lal Kitab, animals are used as profound metaphors for planetary energies. Dr. Sharma explains the exact psychology of a negative, destructive Mars ("Mangal Bad").
A bad Mars creates a highly ungrateful and destructive personality. To illustrate this, Dr. Sharma uses the metaphor of a camel. A camel will find a tree in the desert, rest under its cooling shade, and then, instead of being grateful, it will eat the leaves of the very tree that protected it.
Similarly, a person with Mangal Bad will take shelter, help, and resources from a kind person, and then turn around and destroy their benefactor. Never trust the loyalty of an uncorrected Mangal Bad.