What is Clover's reaction to the violent events?

I assume that you are talking about the killings in
Chapter 7 when you talk about "violent events."  If that is the case, then the short
answer to your question is that Clover gets very sad and starts to
cry.

She is ambivalent about their revolution now.  She
knows that life is better than it was when Jones was running the farm.  But she also
thinks that this kind of violence was certainly not what they were hoping for when they
rebelled against Jones and took the farm for themselves.  And it is not what they aimed
for as they worked so hard on the windmill and other projects.