Tribulation comes in every human generation. Tribulation should be understood in its inner sense. The sun becomes black. The sun means the intelligence or the discrimination power. Black means the evil direction. The moon becomes red. Moon stands for mind (Chandrama Manasah Veda). The red colour indicates emotion and anger. The divine bodies escape their orbits. The divine bodies mean the feelings of good people. Orbits mean the paths of justice. Like this one should understand the inner meaning. It is scholastic language. Jesus is a great scholar. The same tribulation is mentioned in Gita whenever the tribulation appears in any human generation and at any place, I shall come down in the human form to set it right (Yadahi YadahiGita). In Gita Dharma Glanih means tribulation. This tribulation may take place in physical sense at the end. The re-incarnation of the Jesus to judge and punish is nothing but the Kalki incarnation mentioned in Hinduism. It is a very powerful incarnation. But mean while the Lord will come again and again to change the people through the divine knowledge. After many efforts, the final step is taken. When you say that Jesus will come again, it means He will come again and again to preach and change. Such interpretation synchronises with Gita also.
