The fact that the argument keeps changing should tell anyone everything they need to know.
Not to mention we're still in a cold period.
And the notion that there's some global temperature that climate is "supposed to be' is patently unscientific and ignorant of history.
The data shows we SHOULD be in a cold phase but the Earth has been warming rapidly compared to the last 10,000 years. The last time the average temperature rose 1c rapidly it took 900 years. Since the Industrial Revolution( roughly 1850s) the average temperature has risen a bit over 1C.
You can insist that given the great complexity of the Earth's ecosystem, scientists could not possibly know what will happen. They can theorize about weather change and some are right and some are wrong. But there is no doubt that the average temperature is rising and some areas close to the equator will start to be come uninhabitable in 20-30 years.