re: Why was Navy Capt. Crozier fired?

It does exist that there will be servicemen in our ranks that will dislike the president or disagree with him. Some...will see fit that their political affiliation is more important than their Oath.

I served under 4 Presidents. Clinton, Bush, Obama, and Trump. Not once have I considered sabotaging the Mission or defy a security clearance to make a political shot at my Commander In Chief.

This Captain, did all that when he "leaked" information to the Media which would provide information to our enemies.

He's lucky that being removed from Command was all he got. He gets to keep his rank and will probably be back in Command at another location shortly.