"Terrorism" vs "Crime"

A German Muslim scholar's answer when asked about terrorism and Islam said:-

"Who started the first world war? Muslims?
Who started the second world war? Muslims?
Who killed about 20 millions of Aborigines in Australia? Muslims?
Who sent the nuclear bombs of Hiroshima and Nagasaki? Muslims?
Who killed more than 100 millions of Indians in North America? Muslims?
Who killed more than 50 millions of Indians in South America? Muslims?

No, they weren't Muslims.

First of all, you have to define terrorism properly. If a non-muslim do something bad, it's a crime. But if a Muslim commit the same, he is a terrorist.

So first, remove this double standard, then come to the point."