Christians claim that Jesus raised from the dead after 3 days.

3 days? What a coincidence. How many messiahs and religious figures raised from the dead after 3 days?

This myth was invented because of the Sun.

The Sun stays stationary between 21th and 24th December (for 3 days, the Winter Solstice) and then on 25th December “raises from the dead” and days start to increase in length again. It's because of this that it's a holiday for many pagans.

And it is also the reason why was picked by the church as the Jesus's "birthday".

They claim the resurrection has to be true, because the apostles wouldn’t risk their life for a lie.

Yet, there is no clear support for any organized and hard prosecution. Christians don’t claim that the Roman authorities killed anyone after the death of Jesus. The bible says that only Jesus was arrested.

Romans couldn’t care less for the Christians. No apostle claimed to be the king of the Jews.
According to Acts 18:12-17, the Roman proconsul Gallop dismissed a case against Paul.

Even if we believe the New Testament, there are just a few references to mild/mob prosecution and to the killing of Stephen.

And the apostles had good reasons to lie about the resurrection of Jesus (No way I’m going back to be a fisher again). They already had many followers or the Jewish religious authorities wouldn’t see them as a threat.

There were no more killings until more than 30 years later, under Nero. It’s when Paul and Peter are executed (about 64/68 CE) (he didn’t see that coming: damn, I should have kept being a fisher).

This persecution didn’t last long. There were more than a century of toleration until Marcus Aurelius (161–180).

Christians were much more diligent prosecuting others later, for centuries. "Nobody was expecting the Spanish Inquisition", but...