CAIRO - The son of ousted Egyptian President Mohamed Morsi told ABC News that "the military coup will end very soon" and his father will be reinstated as president because "the tank cannot lead a civilized country."

"President Morsi has a legitimacy," Osama Morsi said. Egyptians "will have their president and their constitution and their Shura Council again, I am sure."

In an exclusive on camera interview in the Muslim Brotherhood's media center in the eastern Cairo, Osama Morsi said he hasn't seen or heard from his father since the night of July 3, when the military removed Morsi from power, and worries for his safety, just as he worries for the safety of all Egyptians.

"All people are in danger now under the military coup," he said. "The tank cannot lead a civilized country. And Egypt is a civilized country."

The interview comes after the deadliest weekend since the military removed Morsi from office. Dozens of supporters of the former president were reportedly gunned down Saturday morning. The Health Ministry says at least 80 people were killed and hundreds injured in a predawn raid. The Muslim Brotherhood puts the death toll much higher.

Raising the prospect of another bloody confrontation, the Muslim Brotherhood has called for mass rallies this week after the military-backed civilian government threatened to clear the protesters off the streets.

Osama Morsi said no western democracy would ever allow the army to unseat an elected president, and he dismissed any possibility of political dialogue with the current military-backed government.

"There is no political way with a military coup," he said. But the Muslim Brotherhood's determined opposition to the current government is bigger than Morsi.

"The issue is not Morsi, the issue is not the person," he said, it is about what his father represents.

"For all Egyptians, he is a freedom idea, a democracy idea, a legitimacy idea," Osama Morsi said. "He is my hero, he is [the pro-Morsi supporters'] hero… I wish that we can get back again our constitution, our constitutional state. And we will, God willing."