And there are forums in Israel that say that by 2050 everyone will be D5
I try to tell them that it will take several centuries for everything to be light and love
Don't listen to me
You mean 5d (and give attention to the "d" and "D". They have different meanings), as in consciousness level or commonly called "dimension" (written small d)? That takes time, as you pointed out, and depends entirely on the people living on the planet. Each individual must raise their own levels. It can't be done for anyone by anyone or anything. There is no magic. Just progressive personal work and the more people work together on rising, the faster the planet and universe will rise too. It all depends on us and those that don't want to rise will either be kept at suitable levels until they do or be uncreated. Everything is a choice.
Regards population size as related to raising consciousness levels... a smaller population of only ensouled beings will tremendously help that. Suffering has a role to play in spiritual development but too much becomes detrimental. With a smaller population there will be more resources for each, more abundance and opportunity as well as more peace. Overpopulation is stress, strain on resources of person and planet and also too much competition.
For a civilization to advance it needs to control and improve the quality of it's people, spiritually, mentally and physically. This is what we'll be doing in future via education and things like genetic selection through either genetic therapy in those who can be treated or sterilization of those who can't. In any event the body must be improved in conjunction with the mind and spirit. You can't have degradation as we have now on earth and expect good mental and spiritual growth. These are controversial things today but will become commonplace in tomorrow. As I said, there's no magic. It's all progressive work and above all responsibility for our species' destiny. Something not done too well today with the overpopulation and degradation.