I don't think religion itself is evil. But corporate religion. Organizations and individuals that claim religion as the reasons for thier own sin for profit. People waving the bible as an excuse to do harm unto others.
Worship of a higher power or purpose shouldn't ever be used as a reason or means to commit sins. That's the major problem. Corruption and hypocrisy is rampant because people gather power under the flag of religion. Power easily corrupts the more it gathers.
Sin/evil deeds then. Many decent religions denounce evil deed and have good morals. Then there are other religions that promote sacrifice of life (your own or others).