He would be wrong. As a factual matter, he was partly wrong about Buddhism because some branches of Buddhism do worship the Buddha as a deity. And he was wrong about secular humanism. People may find values and meaning in life through either humanistic or religious worldviews. But religions claim that meaning is based on a god or the supernatural, while humanists derive their meaning and values from the natural world.
Secular humanism is a naturalistic, nonreligious worldview.
Secular humanism worships humankind. But secular humanism is not a religion and humanists don't worship anything. We are far too realistic to worship humanity. While we recognize that all human beings have the potential to do good, we also realize that the potential exists for acts of great evil. Humanity's constant challenge is to understand itself and improve itself.