I don't think this movie is about race relations at all

This movie definitely is based on racism partly, as can be read from this scene (only in the uncut version of the movie)

A long time passed and the brave little group was getting more tired and hungry with each plodding step. At least they left the mountains behind. Now they were in a hot, sandy desert.
"I tired," moaned Petrie. "Way to Great Valley too great way."
"We're almost there," cried Littlefoot. "Don't give up now."
Suddenly Spike became alert and sniffed the air.
"He must smell food," said Ducky. "It's the only thing that would wake him up."
Spike snorted and galloped over a small hill. The others followed, staring in wonder at what they saw. There was a small spring of water surrounded by a group of thin gray-noses (Another word for Ducky's sort). Near the spring but standing apart was a cluster of trees full of delicious-looking green-food, surrounded by a group of fat crown-heads. Littlefoot and the others raced down the hill, yelling and cheering. But they got closer, they saw the hard looks on everybody's face, and the cheers died in their throats.
A stern-looking gray-nose came up to them and said, "What do you want, little ones?"
"Food!", Littlefoot cried.
"And water, yep, yep," Ducky added.
A fat crown-head waddled up and said, "No food!"
"You may drink," said the grey-nose to Ducky. "You are a big-mouth like us. But," he continued pointing at the rest of the group, "no water for them."
"But they need drinks, too!" Ducky protested. They're my friends."
"These are your friends?" said the fat crown-head. "A threehorn? A longneck, a spike-tail and" - he pointed to Petrie - "and whatever that is."
"Yes, run away quickly," said the grey-nose to Ducky, "before spikes and horns grow on you."
Cera couldn't believe what she was hearing. She had never realized before how foolish it was to dislike someone just because he looked different. All she knew now was that they all needed food and water. She reared up her head and said firmly, "We're hungry! All of us!"
The thin grey-nose stared at her. "And so are we," he finally said.
"Then why don't you share the water with the crown-heads?" said Littlefoot. "And they could share the food with you. Then you wouldn't be hungry and they wouldn't be thirsty."
"No, no, no," said the crown-head and the grey-nose at the same time.
"Well, if you don't change your minds, all of you will die," said Cera.
"Why don't you like each other anyway?" Ducky asked.
"The crown-heads are from the other side of the swamp," said the gray-nose.
"I don't see anything wrong with that," said Littlefoot.
"This is silly. I'm hungry," cried Cera. "Let's go somewhere else to look for food together." And with that the small group marched away. The grey-nose shook his head. "I'll never understand those young ones," he said. The crown-head nodded and went back to guard the food.

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