I think the headline is slightly deceptive:

The belief that Israel’s actions amount to apartheid, ethnic cleansing and genocide are “worthy of respect in a democratic society”, an employment tribunal has concluded in a landmark decision.

“Worthy of respect” and “worthy of respect in a democratic society” are two very different things. If you don’t respect anti-Zionist beliefs, that’s your personal issue. A democratic society has a duty to respect such beliefs.