That's a loaded comment with a ton of historical revisionism behind it, there's countless sects that Christians have persecuted and eliminated since the Roman times.
Let's not forget the 30 years war, when Europe basically burned itself to the ground because of Catholics and Protestants. Millions have died just because they believed in the wrong version of Christianity.
They took advantage mainly of the resentment from the Treaty of Versailles, which combined with the economic depression that the world was going through.
Diversity, Inclusion, Equity isn't being forced on anyone. Again, in any functioning society, you tolerate folks for their beliefs and live and let live, but there is a hard line where you cannot tolerate the intolerant. I would bunch Radical Islam and Extremist Christian White Supremists here too.
That mention of Islam is completely random. I thought just a line above you said Christianity accepted all creeds?