There were many muslim attacks abroad, but the Crusades only happened in a limited region. Such a small area. If it was anti-muslim measures, why was their area of influence so small? Were they weak?

Not interested in debating this. The crusades covered a lot of ground and took Jerusalem which was their main goal.

What did the Bereans do?

You're taking this out of context. Preaching the gospel to the jews was done so that they can understand that Jesus is Christ, the Messiah that their prophets wrote about and that they've been waiting. But it was Paul, who was an apostle of the Church, who instructed them in the teachings and made known to them the correct interpretation of the Scripture (meaning the Old Testament here) where Christ's coming was prophesized. I hope you're aware there wasn't a written Bible at that time.

So does baby baptism work or no? Is the Rapture pre, mid, or post trib? This is a broad claim to tackle.

Yes, the Church has always practiced infant baptism and it's in the Bible. There's no rapture - this is part of the millenarist heresy condemned at the Second Ecumenical Council in 381. It was promoted by jesuits and later popularized by John Darby in the 19th century along with other zionist teaching.

As in universal. Not RC.

Correct. Once again, I'm not Roman Catholic.

Meaning? As in, the Apostles of the Bible? Or do you think there can be new ones made today?

Meaning the apostles of the Bible upon whom Christ sent the Holy Spirit at Pentecost. They are the foundation of the Church. Just like there were no more prophets after John The Baptist, likewise there were no more apostles after the last one of them died. This is why Islam, Mormonism and all the cults claiming new revelation are false.