Their attitude for some reason is changing. Either they have noticed that they can no longer hold Iran back or something else is cooking that we don't know about. They are also rational people. "If you can't defeat them, join them" works both ways. What do you understand from this?
Iranian member of parliament Fatemeh Alia said on the parliament floor Aug. 25, “On our soil, UK’s foreign secretary spoke with BBC radio and said we will
judge Iran’s approach with respect to Israel based on their actions and Iran is no longer a threat to Israel. Presumably, as those who justify [his comments], our foreign minister will once again say the comments are for domestic consumption.”
Read more:
Hammond's comments on Israel strike nerve in Iran - Al-Monitor: the Pulse of the Middle East