Commonsense and the law of 'supply and demand' are congruent; when you increase the cost of 'something', people buy less of that 'thing'. In this case, you have increased the cost of employment, so employers are hiring fewer employees.
Are you claiming that employment is a 'Veblen good' here that the increase in price has no relationship to demand?
Just because we fail to have the tools to accurately measure the cost of Obamacare on employment does not mean it has no cost.
Increasing the cost of employment does not create jobs.