Be saying that we need to respect all beliefs equally (rather than all people equally) you throw out the idea of truth vs falsehood. I'm sorry, but not all ideas are equally reasonable or correct and I believe that pointing out these issues should not automatically be considered offensive or bigoted. The truth is that religion is about faith and not evidence, and I think that that mindset in itself can be extremely harmful to individuals and society as a whole. And religious texts (esp the Abrahamic religions) are filled with calls to violence and other atrocities. There is plenty of reason to keep the pressure on these institutions and to point out absurdities. It got to me eventually and I was a fundamentalist Christian for 25 years. I'm glad for the skepticism movement.
So, how do you suggest we have this conversation? Formalised debates? In my opinion people spend too much time being self righteous about how "open minded" and polite they are. I also think that that attitude gets us nowhere in the long run. Listen, I wouldn't have picked a gif like this personally, but I don't see it as an innapropriate or over the top jab. Some people need gentle persuasion, others need a few social kicks in the butt like I did.
And yes, putting down stupid ideas is EXACTLY how you fight them. We can't just ignore every wrong idea and only promote right ones. That's the coward's way out. Possibly more important than promoting good ideas is fighting the bad ones.