Taking action may be viewed as courageous or merely stupid, depending on your point of view.

It was annoying to have her father called a slave over and over again, but she knew that Nails was not being malicious, merely stupid.

Or is the man merely stupid?

I urge The Times to be more responsible and stick to reporting what is hip rather than what is merely stupid.

Most of these books were merely stupid, though some of them added the distinction of silliness.

If they were merely stupid they would occasionally make a mistake in our favor.

Fortunately it isn't, and thus your point goes beyond moot to merely stupid.

Senecal was not a malicious man, merely stupid and easily led.

He saw clearly that the telephone call, which only two days ago had seemed a noble act, had been merely stupid, pointless and suicidal.

Was he loyal, or merely stupid?