There is something to be learned in this. There were some, not all, not even most, but some Christians who were cheering or silently supporting the Muslim attacks on Jews. The thinking is, 'they are getting what they deserve for killing Christ.'
However, what these Christians do not seem to realize is that they are on the menu too. As soon as the Muslims run out of Jews to rape, torture, harass, and kill, they move on next to Christians.
Muslims are indiscriminate murderers. They kill Christians, Jews, Hindus, even other Muslims with glee. That is why converting to Islam is the most dangerous thing a person can do. It is more likely to get you killed, not 'save' you.
As soon as you convert, no matter what sect you choose, you immediately have millions of Muslims in a different sect who want to kill you. So, what can you do? Nothing.
No matter who the Muslims happen to be killing this week, including Jews, they will be killing you next week. Any rational person has to realize that Muslims must be driven out of modern civilization back to their craphole countries they came from where they can kill each other at will, instead of us.
Cheering Muslims today, because they happen today to be massacring a people you do not like, is like cheering on and supporting a pack of rabid dogs. It is only a matter of time before they turn on everyone, and eventually, on each other.