I finally figured out the most likely reason Jihan is blocking SegWit both on Bitcoin and Litecoin.
Bitmain as the manufacturer of 70% of the mining ASICs, see the issuance of tokens as their exclusive domain. In other words, they very powerful shadow elite who are backing Bitmain want all the tokens issued for themselves. Yes I suspect MP is an owner/investor of Bitmain.
So therefor they need to control that the price doesn't rise faster than the supply of hashrate so that marginal miners (those not in their cabal of mining farms with subsidized electricity) are never significantly profitable. In this way, all the economic value from mining ends up in Bitmain's pocket with which they can purchase the tokens for their shadow elite investors/owners.
But SegWit would enable Core to make upgrades in the future to Bitcoin's ecosystem without needing hashrate activation. Thus Core could in the future push the price up and down, removing that control from Bitman.
This is probably why miners are pushing extension blocks instead as a scaling solution.
Miners will support a change to Litecoin's protocol which allows LN to be added for Litecoin, but Jihan will probably block the features of SegWit which allow softforking version changes. Also I don't think LN (off chain scaling) will ever be allowed for Bitcoin because I explained else where that it causes instability of the block chain and no need to risk for the $billionaire's settlement blockchain which is what Bitcoin is to become.
On Litecoin, Jihan enabled the hype to push the price up so he could presell the April 15 and May 15 batches of L3+ miners at what seemed like a bargain at current LTC price and hashrate, but he probably knows he is going to block SegWit activation and crash the price as well raising the hashrate with those new L3+ miners shipping.