A king is getting ready for one of the princes to be married and invites a ton of people to the wedding. He sends his messengers to hand deliver the invitations but all the messengers were killed by the people that were supposed to be invited.

Then the King sends his army to kill all the people he invited because they had killed the messengers.

So this time the King just invites anyone he can find including poor & homeless people who he provides bath and a clean suit to wear to the wedding.

As they are celebrating they notice some people there but instead of them wearing the suits provided by the king they put back on the dirty worn clothes that were wearing on the street.

The king has those people thrown out of the feast.

The A list was the nation of Israel. The poor & homeless are the rest of the world. We have all been invited in.

TL:DR - God has welcomed us all because Israel rejected Him. We have an opportunity to join Him or reject Him too.