This post may seem like a rant, but I'd really value your insight. I know I can sweat the small things sometimes, But I strive to be genuine and trustworthy when dealing with people in the workplace. Being genuine can be a challenge when:

1) There are times where I'm in front of a potential client or business partner and during conversation, they might credit their good fortune to the notorious G.O.D.
(Ex. "This happened by the grace of God" or "We Thank God for that") I just don't have it in me to agree so I'd just find a way to deflect it by playing along. Like nodding my head or saying something generic yet charismatic like "absolutely" or "you know it!" Or "there ya go!" Or "you can say that again!" Because I would hate to lose business because they know I'm a non believer.

2) A mentor or boss praises God and gives me that look like they expect me to do the same. It's awkward.

3) Just the other day I read a post here that reminded me of elementary school. Wondering which God we were talking about when saying the pledge of allegiance. NOW literally the other day, I'm at an Award/Dinner/Professional Networking event and they start with the pledge. That's cool. But then a guy took the mic and went on for like 20 minutes off topic about god and religion. I thought it was inappropriate and it even confused some religious people in the room, but nevertheless a huge applause broke out anyway and I'm just there not applauding and trying not to be noticed lol.

So far I've just deflected the conversation, but I don't feel as if that sends the best signal.
You guys reading this are diverse in age and experience so please tell me. Is there a better way to handle religious people in the professional world? Or should I just "Fake it till I make it" as they say?