Why do some christian groups focus more on politcal issues and endtimes rather than God's love? [Spirituality & Religion]

Because time IS short. Either way, people who do not want to know about God and the end times, or his love, would not listen regardless, because they don't want to know God. All they can do is make fun of people who do love God. I'm not Jehovah Witness, but God does want his people to spread the gospel before He does come back. And His return is not a guess. It is eminent. That is prophecy, and prophecy is coming to pass right before our eyes. People do need to get their hearts right before He comes, because after the fact, it will be too late. He could, indeed, come at any time. It's just like the days of Noah. The people were warned for a hundred years that God was not happy with their sinful ways, but they didn't listen then, either. He is a God of love, but He will not be mocked by people and made fun of forever. People in this generation have not gotten better. They have gotten more evil. That's obvious. Further, Christianity is not connected with the Islamic faith, as suggested by some.

Some sects are apocalyptic. Even Jesus an John the Baptist were apocalyptic and said to not care about this world cause it was shortly to end. Though in that case they really should be getting their own house in order. But they have a drive to try and save as many as they can before the end. That is the reasoning at least.

They want the world to die so they feel special from their perch while all the nonbelievers are burning.

This is also something I'm curious about.

Just an FYI Jehovah Witnesses are not Christians.

You're guess is as good as mine.