Struggling with My Christian Faith, Seeking Truth in Islam

Assalamu Alaikum! I was raised Christian, bouncing around between Catholic, Protestant, and Orthodox churches. Lately, I've woken up to a harsh truth: many Christians here in America have strayed from the real teachings, chasing greed, division, and fear of outsiders. I look at folks around me, and they mostly just care about their own circle-people who share their ethnicity, religion, or culture. The suffering in poorer countries? It's like a distant idea they ignore. If cheaper resources come at the cost of faraway lives, there's no Christian mercy to be found. Innocent victims in the West become just 'collateral damage' in the so-called War on Terror. The only ones who seem to stand up are Muslims and a few on the far left, who, like me, refuse to give in to Zionist agendas. This reality shook me and made me rethink Islam. I asked myself: why do Muslims, a faith so often mocked and hated, resist so fiercely against the oppression of nations not their own? Look at the Houthis-they've fought hard to stop the massacre in Gaza, and so has Hezbollah. Geopolitically, these groups would gain more by avoiding conflict with Israel, not giving any excuse to expand the violence. And there's the big Sunni-Shia divide, yet they've set aside differences, showing incredible bravery and selflessness against imperialism. This pushed me to start learning about Islam. I've begun reading the Qur'an, and I'm honestly open to it being the word of Allah. But the beliefs that Isa (AS) isn't the son of God, wasn't crucified, and that the Trinity is wrong-these clash hard with everything I grew up with. What's the explanation against these core ideas of Christianity? I do believe Prophet Muhammad (SAW) was a messenger of Allah, but it's tough letting go of old, deep-rooted beliefs. Any guidance?