The last question does show more "favor" than "oppose" for installing back doors in encrypted systems, but the first question shows much more "oppose" than "favor" for reducing encryption to help government agencies. The second question shows that more people want tech companies to protect customer privacy than to cooperate with government agencies to fight terrorism and crime.

So people want encryption back doors that don't reduce encryption and don't require tech companies to cooperate with government agencies. Of course "we can have all the good stuff and none of the bad stuff" is a common delusion among government agencies proposing encryption back doors too.