Reply To: Chabad Inspires all Jews to Yearn for Mashiach

the reason chabad eats before davening is simple. the shulchan aruch harav paskens that if one needs to eat to be able to have more kavana by davening, its permited. the custom in chabad is to learn 1-2 hours (at least) of chassidus before davening – to prapare for davening – learning about gadlus ha-kel, then to daven which is a major focus – (also mikvah, hisbonenus, long davening (a good few hours) (the alter rebbe says in tanya that todays days davening is the ikur avoda (not torah – like in the time of gemara))
so most people would be very hungry if they did not eat