Executive orders are legal and even necessary in limited circumstances. But Obama, as he says, is using them to bypass Congress, or to act when the "refuse to act".
Can you name any EOs issued by Reagan on par with Obama's plans to legalize millions of illegal aliens? How many executive orders a president issues doesn't mean much.
My responses have been to the original premise of this thread. It maintains that Obama should not be acting against the wishes of Congress. All presidents have done the same. We just don’t like Obama’s actions.