[Rashputin]

The hexagon in the center is six sides, each side has a triangle attached giving six points.

That's 6 sides, 6 trangles, and 6 points, giving 666.

So is there some "I'm offended" clearing house someone should notify if they're offended by the Antichrist 666 being on the flag of Israel?

[rfp1234]

OMG, by that standard the atomic structure of ring silicates is"offensive" too. But no mineralogists have ever complained to God about it.

[BroJoeK]

It's all complete nonsense because US sheriffs' badges typically have five, six or seven stars -- no particular reason for one or the other, except possibly that stars on US flags are five pointed.

See here for examples.