There are lots of extraordinary claims being made everyday. It's the correct rule of thumb to be as skeptical possible, for there are many more outrageous claims than there are legitimate ones.

If you're interested in truth you should always be skeptical about everything.

But I think it needs stressing that being skeptical is not the same as being dismissive or ridiculing or having a hostile attitude towards things.

I think that the reason people tend to reject new ideas tends to be more on emotional terms rather than for truly skeptical reasons.