>>I think it is a colonial hangover, where western culture and Christianity were thought to be superior to everyone else

I think you carry a big chip on your shoulder,

You cherry pick and provide out-of-context facts to pad your arguments - all focused against Western culture and Christianity.

You country of origin got conquered. As many others. Empires raised, spawned multiple continents and peoples,  then fell.

There were socioeconomic and historic reasons why things happened the way they did. 

If these make you feel inferior, trying to misrepresent history, or the present won't help.