Is it true that in a fire, pigs do not run away from the fire, but jump into it, and if so, why is this happening?

This is probably due to forest fires. Pigs throw themselves into the fire to escape to the burnt-out part of the forest, but this is just an assumption.

One hundred forty characters is sixteen characters

Pigs think that they will go to heaven as martyrs, and all other animals will simply die.

"All animals are equal, but some are more equal than others" (c) "Animal Farm", Orwell.

Quite right.

Like a fading woman trying to jump into the "last car of a departing train" rushing on the neck of any crook, just not to remain unmarried, so the pig at this moment realizes that its main purpose is leaving in life. Become a kebab! And, no longer looking around, not listening to the advice of others, she goes straight into the hell. With your head held high.

The most pressing question in our time.

I have two options.
The first is depressing. Pigs hate their bodies, they want to go to hatha yoga, order sauna belts from the shops on the couch, and design their small gym. But their tongue is not very good, and the yoga mat is difficult to fold with a patch. As a result, the pig runs into a fire granted by God in the barn to "burn" the fat.
The second is gastronomic. Pigs love bacon. But since pigs are bacon, that's their curse. And they pay this price, they pay in full, jumping into the conflagration to bite off at least a piece of the coveted delicacy.
There is a way out of both situations.
We must help our beloved pigs by teaching them to gather in fitness groups.
And tell them about a trick in which one pig runs into a fire and comes back burning, so that its victim is not in vain, and the companions eat the pork.

Shta?
Pigs are smart animals with a keen sense of smell, touch and hearing. Only they don't see very well. They react quite actively to any changes in the external environment. When my neighbor's pigs saw a fire in the village, they started to get very nervous.
Pigs burn out together with other animals in a fire, because they are locked in a pigsty and they can't run.