Yes there is a lot of evidence that religion is certainly making us stupid, just look at the world today, what the......is happening, we all seem to be going backwards, so yes, what do you think, are we getting more stupid, I believe we are.
It depends on your definition of religion. What we see today as religion is not really religion but the death of it. True religion, which is the acquiring of a noble and virtuous character is all but dead leaving only the useless outer form of ceremony, lip service and ritual. True religion focuses on good deeds.
If the world were truly religious it would be at peace.
To reject anything but good deeds and a virtuous character is a truly noble act for we get what we accept.
If we are willing to accept mediocrity that is what will be dished out by religionists.
From religionists we should expect nothing but the highest standard of behavior otherwise the accusation of being fraudsters and lairs rightfully applies for it is the religionists that are making all the claims so it is up to them to live up to their beliefs.
People are now demanding of religionists only purest virtue. It's all about deeds now, no longer words.
Baha'u'llah prophesied you and others like you in this Hidden Word addressed to His followers.
O My Friends!
Quench ye the lamp of error, and kindle within your hearts the everlasting torch of divine guidance.
For ere long the assayers of mankind shall, in the holy presence of the Adored, accept naught but purest virtue and deeds of stainless holiness.”
Baha'u'llah