from the merriam webster
Believe
intransitive verb
1 a : to have a firm religious faith
b : to accept something as true, genuine, or real <ideals we believe in> <believes in ghosts>
2 : to have a firm conviction as to the goodness, efficacy, or ability of something <believe in exercise>
3 : to hold an opinion : think <I believe so>
No mention of “Jesus” or “Godhead”. So herein lies the fundamental problem with the question. By proper definition, we are all believers in SOMETHING.
It should be asked, ”...there appeared to be more believers in Christ…”
I wouldn’t normally nitpick, but your appropriation of the word “Believer” to promote your specific beliefs (about Christ) is just so arrogant and myopic. I thought a neutral dictionary definition was needed.