If this holds these miners will mine Segwit blocks before the end of July.
This basically means that the remaining 12% of miners could mine old legacy blocks but given their they are in the vast minority it is expected that they will follow and also mine segwit blocks.
Expected, but what if they don't??
This mean there would be 2 coins no?
Yes, but the second one ll be just another alt, which will be dumped into oblivion, which means it will not be profitable for them to mine it. As a result, there will be only 1 BTC and all this fuzz is just assholes and ignorant people creating panic.
10% of hashrate should not decide faith of BTC, that s good old democracy.