According to the 2012 census, Catholic Christians represented 43.7% of the population, Protestants (excluding Seventh-day Adventists) 37.7%, Seventh-day Adventists 11.8%, and Muslims 2.0%; 0.2% claimed no religious beliefs and 1.3% did not state a religion.
https://en.wikipedia.org/wiki/Rwanda
Hmmm, what do these numbers say about Rwanda? What is the smallest religious group? So why did deportations start with Rwandans? Given the way the UK is heading in the future they might be happy having been sent back.
“So why did deportations start with Rwandans?”
They are not deporting Rwandans, they are deporting people from other countries to Rwanda in the hope of deterring them from trying to get into the UK.