BG: " If we apply the same logic to Trump then why is it a big deal for Trump to disclose the information he did?"

Well first of all, applying any type of logic to Trump is a fool's errand. Secondly, if you were to apply the same logic, Hillary had no intent nor did she share the information. Trump had intent and did share the information, so no comparison. 

Keep in mind the damage Trump did wasn't just playing footsie with Russian spies. He betrayed a promise made to the nation who provided the information. The promise was that we wouldn't share that information (even within our own government) without their consent. Intelligence relies on relationships and cooperation (which are concepts foreign to Trump). When you violate those relationships, the information dries up, we are less safe, and Trump, again, violates his solemn oath to protect the United States from all enemies.