I do agree with them about the Talos thing, in that I don't think he should be considered a god.
There's a decent percentage even amongst the Altmer that would disagree that's an odd concept. The Psijics for example, and others in the Altmer culture believe in the "old ways" that there really aren't divine beings, but that those entities are just really old and really strong ancestor spirits that only seem "divine" due to their strength and powers being honed for centuries. The concept of ancestor worship is not really uncommon by any means even in the real world. Art reflects life.
In reality, I think the Thalmor do dislike the Talos thing, and sizable faction dislike it a great deal, but they care more that the ban in place is really meant primarily to weaken their enemy by driving a wedge between the empire and at least a large portion of Nords in general and getting Cyrodiil's northern border agitated.
The Thalmor are not likely going to be able to open up a northern front in the coming war themselves, but if they can trick a decent even a decent sized empowered minority in Skyrim to do it for them, then their own personal objectives in the upcoming battles are far easier.
Like them or not, one thing you can't take away from the Thalmor though is they are very crafty with their strategic planning.