Sentence examples for this was because from inspiring English sources

This was because of their fanaticism".

This was because of RSI problems.

This was because he always remained normal.

This was because I learned from them.

Partly this was because she was cheerful.

This was because of his devotion to Russian folk dancing.

But this was because it was a living forest.

This was because of headaches over their care packages.

Maybe this was because Jonathan was inured to advances.

Bouvier assumed that this was because of the divorce.

Sid claimed this was because of his violent personality.