> The US got roundly criticized for intervening in Somalia.
> ...
> Then Rwanda happens

For reference, those were only 6 months apart:

• Oct 3, 1993: Battle of Mogadishu ("Black Hawk Down")
• April 7, 1994: Rwandan genocide starts

The fact that so little time passed between those two events is highly likely to have played a role in determining the response to the latter.