Christians are new testament. Jesus didn't say to use swords to convey the gospel. He said pray, love, and forgive. Jews are old testament. God wiped out evil people as he saw fit in the old testament.
"Religions" as many think of are man-made instituions used to control, subjugate, and install political hierarchies over overs. Catholicism, government associated forms of Christianity, Mormons, JoHo's, all just bureaucratic politics controlled by evil men and ultimately Satanic. Islam, from it's origins in the Arabian peninsula was inherently violent and as the Arabs conquered folks from Arabia west to Morocco and east to India they forced them to be muslim by sword and still do to this day.
What is the truth to save one's soul is to worship the one true God, the God of Abraham, Isaac, and Jacob and to thank, follow, and allow Jesus to be one's intercessor to God and to be baptized in the Holy Spirit. No sword needed, no Pope needed, no man-made religion needed, no money needed, no politics needed, just God, Jesus, Holy Spirit and it's free.