I tried low carbing/Atkins ONCE. I suffered headaches, was exhausted, and I literally couldn't THINK.
Most of the reason that carb bashing happens, is because most fattening foods (donuts, cake, cookies, chips, etc.) are carbohydrates...but, they are either refined carbohydrates, or fatty carbohydrates, or BOTH. Because of these carbs being refined or loaded with sugar, they cause the blood sugar to spike, and then crash rapidly...making you hungrier and craving MORE refined carbs shortly thereafter.
But, all carbs are not created equal-brown rice, oatmeal, fruit, vegetables...these carbs are EXTREMELY healthy for you!!!
But, most people don't get fat eating fruit, vegetables, and oatmeal...they get fat from eating the carbs mentioned earlier.