Not curious at all. They are complete opposites.
SETI is an investigation that states quite explicitly that they do not know the outcome. SETI is an investigation.
By contrast, ID has zero scientific results, zero output, zero measureable scientific work product, but already has come to several very profound "conclusions".
10 years ago when ID was first proposed, we might have (IMHO generously) called it a working hypothesis. After 10 years and zero output, it can no longer be called even that.
Real science, like just about everything else, requires work. You have to produce something. ID has produced nothing.
This is why ID is essentially a liberal philosophy. At the core of conservative philosophy is hard work. Lower taxes are conservative because it allows hard work to be rewarded. Free market economics is supported because it allows hard work to be rewarded. Property rights are supported because it allows hard work to be rewarded. Etc. Etc.
Real science is hard work, just ask any of the practicing scientists on this forum.
And the work product of ID after 10 years: ZERO.
Nifty and humorous idea.
However if it were so liberal - why do so many of the 'Religious Right' fall over themselves to embrace it? Also going to the extreme of raping science textbooks and classrooms with the ID attack...