This is a set of images I got from CoinTelegraph . It explains the forking very well.
Figure 1 : Main difference of Segwit. Separation of signature from the blocks. To me, this is bad for security.
Figure 2 : This happened on 1 August 2017. Which means that if you have Bitcoin before 1 Aug 2017, you would also have Bitcoin Cash on 2 Aug 2017. Redeem it if you can.
Figure 3 : This would be happening now given Segwit. It would be unhealthy for Bitcoin in the long run.
Figure 4 : I just don’t see how is Segwit good with the normal way of increasing block size.