A lot of the drama here is due to the ambiguity of what the word 'think' is supposed to mean. One camp associates 'thinking' to consciousness, another does not. I personally believe it is possible to create an animal-like or human-like intelligence, without consciousness existing in the system. I personally would still describe whatever processing that system is doing as 'thinking'. Others believe in "substrate independence"; they think any such system must be consciousness.

(Sneaking a bit of belief in here, to me "substrate independence" is a more extreme position than the idea that a system could be made which is intelligent but not conscious, hence I find it implausible.)