MAGA is a cult (and consists of previously existing cults such as Evangelical Christianity). As Trump said, there's nothing he could do to lose their support.
Many countries are supporting these wars, death, and destruction as well (e.g. France, Germany, U.K., many countries in the region, Israel).







At the most basic level, the Trump admin likely has plans to make bank on it. Perhaps bribes or "deals" with oil companies, Israel, weapons manufacturers, etc.
Also, a part of the MAGA coalition consists of Zionists (the Evangelical Christians and Zionists Jews [both are death cults, IMO]), which makes it easier for Trump to do these things without too much opposition from MAGA. And, groups like AIPAC have been somewhat successful at tipping the scales of US elections against politicians that don't support Israel.