Apparently, a group of Bernie supporters were denied entry to the convention last night. (Supporters, not delegates. The delegates remained.) These supporters are quite upset about it.

But let’s step back a bit and think about it.

The way to win elections is to have four nights of a convention with no protests — with unity. Free advertising on TV for four nights! Democrats needed to put on our best image.

Some Bernie supporters are complaining that the whole primary system was unfair because the DNC leadership had already chosen a candidate years ago. But that’s what always happens. There’s always an insider. Eight years ago, it was also Hillary Clinton. That time, she lost. Obama got more votes. And then Hillary’s supporters showed up at the convention, didn’t protest, and cheered on the nominee because they were Democrats who knew what was best for the party and the country.

On Monday, a bunch of Bernie supporters (upset with the fact that he had lost) disrupted speeches, argued with other attendees, and showed the party to be at war with itself. Or was it with itself?

Let’s face it, Bernie was not a Democrat. He became one, ran, lost, conceded, and then announced that he had resigned as a Democrat and is now once again an Independent. He bolted from the party even before the convention was over.

He is no longer a Democrat. He is no longer in consideration for the nomination.

So now a bunch of people dedicated to someone who isn’t even a Democrat and is not in consideration for the nomination want admission to the Democratic convention? For what purpose?

The Democratic convention is not a place for non-Democrats. And after the way the Bernie supporters disrupted Monday’s convention, you can see why they weren’t exactly welcome.

The key is this: If you really care about the Democratic party and what it stands for, and especially if you realize how important this election is, then you look after what is best for the party (and America).

You don’t get to crash and disrupt my party and then get mad when I ask you to leave.