You’re very good at strawman. I didn’t say communism is atheism. However, you’ll find that many communist regimes were atheistic. I’ll give an example for atheism and secularism.
The USSR had an atheistic regime, which caused a lot of suffering for its people and surrounding countries they took over. They also didn’t like religion and wanted to get rid of it. (history.com/…/joseph-stalin-religion-atheism-ussr)
All the secular colonial states that have taken over other countries. Plus, the issues that continue to this day. Take the middle east for example and the lines drawn on purpose to keep the region destabilized. Or take francophone Africa which to this day suffers from Frances control over the region through dictators.