The rational responders are at it again. Now they are asking folks to post videos denying the Holy Spirit. Nothing wrong with that. But I think they are missing the point of the passage on blasphemy and the Holy Spirit.
The passage isn't over the question of belief or non belief. It's a story of how Jesus' healing ministry is called demonic. Calling the work of God demonic is the problem. If there's an application today, it is to not be so quick to condemn because it could be the hand of God that is being condemned.
"Walk up to people on the streets exclaiming your joy that you deny the holy spirit, and how good it makes you feel inside!" I'm sure people will appreciate that as much as when fundamentalists shove tracts at them. It may produce a buzz for the one doing this, but not for the recipient of such treatment.
And that's the point. It has nothing to do with dialog or learning from the other. It has a lot to do with going after folks one is fearful of and getting validation for one's beliefs, etc. But such acts make it that much less likely that either side will be in a position to be open to each other. That's unfortunate.