That's why I said "in part".
Reagan's non-response was unfortunate, perhaps even tragic. But a multitude of others had an opportunity to make an appropriate response and delclined to do the right thing.
Iraq Hostiges, Kobar Towers, Tanzania, Narobi, Cole.....all were basically non-responsive to an entity that had declared war on the United States in 1996!
Blaming Reagan is simplistic and ignorant. Radical Islam many have reared its head on his watch.....but others let it prosper....until G. W. Bush came along.