You need to be very careful when bees are in a chimney, especially if they are in the flue itself. If they have drawn any comb the heat of the rising smoke/gases from a fire cam melt the wax and start an instant flue fire.
When bees are actually entering a building interior space it's quite common to find dead ones all over the place...window sills being a prime spot. This doesn't mean that they have been sprayed, The bees are attracted to the light of the window or light bulbs etc. and work themselves to death much like moths do.
"In the first place, we should insist that if the immigrant who comes here in good faith becomes an American and assimilates himself to us, he shall be treated on an exact equality with everyone else, for it is an outrage to discriminate against any such man because of creed, or birthplace, or origin. But this is predicated upon the person's becoming in every facet an American, and nothing but an American...There can be no divided allegiance here. Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag...We have room for but one language here, and that is the English language...And we have room for but one sole loyalty and that is a loyalty to the American people."
Theodore Roosevelt 1907