Islam preaches hate and the refugees are violent:
..... surely that is what you are doing at this time?
The Koran tells us that Muhammad and his were surrounded by forces set upon their destruction. It was a very fraut time for the believers and extreme situations can require extreme measures.
Understanding that Muhammad and his followers were fighting for their very survival, you begin to see the reasons for what he said, 'back in the day', 'at that time'. Dreadful situations can unfold even amongst citizens of the same country in extreme times. The US civil war might be an example, but that was 'back in the day' 'at that time' and only a very few citizens still hold those same hatreds, or quote extreme speeches from those old commanders as if it was still happening now.
That's the problem with Islamic extremists today. They read the Koran as if Muhammad is with them and they are surrounded by folks bent upon their mass destruction. They're quite mad, not at all like peaceful followers of Islam.
Unfortunately, if outside extremist nutters get their way, and all Muslims are confronted, accused, controlled, attacked, overpowered, the history of Muhammad's day-by-day fight-for-survival might be reborn throughout the whole World, and Muslims will know that they must fight like Muhammad needed to fight.
And then it will be a Holy War. And sabre rattling nutters will creep back into the shadows and leave all Hell to unlose. We've had two of those wars, and we don't want it.
So ..... no...... Islam does not preech hate and Muslim immigrants are not violent..... just that tiny minority of nutters.