Well we crazy meshugah Christians (you’ll find that a lot among fundies) do believe in the “loyal love” of the Lord. Christians, too, have been accused of going mad for God. I’m thinking yesterday, Pentecost in a traditional Christian calendar. It commemorates how many believing Jews were together in a room and the Spirit came upon them and they worshiped in languages that weren’t native.
There’s a poetic form in the bible, the Shiggaion, which also I believe derives from a Hebrew root meaning to “go mad.” It is a highly emotional form. And there are other passages in the Psalms that go nearly that way. I really don’t understand cold Jews and cold Christians. God was and is not cold.
Judaism can certainly seem cold, unfortunately and to our detriment. We do believe that it was part of G-d’s plan to sustain us until this time. For warmth, see Chassidus.
http://www.chabad.org/library/article_cdo/aid/147465/jewish/On-the-Teachings-of-Chassidus.htm