
It really depends on what we mean by "thinking" and how it is applied.
Naturally those who have run across religious people who are narrow-minded, intolerant and whose words and actions broadcast that faith is the antithesis of reason will be tempted to conclude that if these people would only think more, and do so critically, they would either be a more enlightened religious person or abandon religion altogether. The outcome depends on which of those is closest to the critics own preferred self-image.
Then there are those who think that the liberating message of religion is being held hostage by the elites, which include those with more access to education and with more time to wax philosophically about the meaning of it all. They conclude that any genuine spirituality should be accessible to any sincere seeker with any level of formal education. Others feel that thinking too much on one level of analysis about religious ideas or practices can be a problem because it closes off avenues to other forms of experience.
Those who think there is too much thinking in religion and that there is too little are both right and both wrong.