The revolutionaries( of the "THE TERROR") felt he was a royal so they would have done him in.
The French are only for the French usually unless there is something to gain by backing another guy/country.
The MOST unique thing about Lafayette was that he was NOT like MOST French people. HE WAS A MOST UNIQUE MAN OF HIS ERA!!!
You know there hangs on a wall at Mount Vernon a key from the Bastille sent by Lafayette to Washington. General Lafayette was FOR FREEDOM just as was our own General Washington!!
Also Lafayette prevented Napoleon from regrouping and fighting to the bitter end after Waterloo.