Source code is open source doesn't mean squat for safety. Have you audited the code? Do you have the skills etc required to prove its not backdoored?

Because I know I don't have that skill set or time. I do have however some big fat red flags on using it because it was opted for by an entity whose entire existence is based around backdoors and spying.

Honestly i find it absurd that some folks say just because something is open source it's automatically safe. The vast majority of us whether the project is open source or not lack the skill or capacity to pick up on a well obfuscated hole. Hell even the best of us aren't that good.