The bitcoin cash forking attracted some hash from bitcoin, so the bitcoin is less secure. That will impact the bitcoin price negatively. The price will rise eventually as the hash comes back.

"The Crackdown Continues Unabated
Up until now, there has been some debate as to whether or not China would revert its stance on cryptocurrencies. This latest development seems to indicate that will not be the case. The Central Bank plans to further regulate the power usage of Bitcoin miners in the region. This effort is taking place to reduce the scale of these operations and eventually force miners to different countries altogether.

This has caused some miners to pay more attention to European countries. Iceland has been extremely popular in the past few years due to its abundance of cheap electricity. Other European countries are also of great interest. In Canada, Bitcoin miners are also launching new operations as we speak. China’s role of importance has all but dissipated, yet the government failed to bring Bitcoin down to its knees.

For now, developments like this one will continue to occur in China for some time to come. During the seizure of this hardware, five people were identified as persons of interest. One other individual has been detained for his involvement in this mining operation. It remains unclear if they will face any legal repercussions for partaking in this venture."

“I do not think the challenges and in-fighting between various crypto camps are a bad thing. In another way we're effectively witnessing democracy in action. These are, in part, simply growing pains of a new technology, but by blasting through these roadblocks Bitcoin also becomes more robust and resilient. This is why, in my opinion, Bitcoin continued to rally to all-time highs after the Bitcoin Cash fork during the summer; Bitcoin users have realized that "Bitcoin is still Bitcoin" any time a new fork occurs.”

So the debate has attract more attention and the price of both coins have risen a lot recently.

Miners will protect the Bitcoin as they can only make money out of Bitcoin. Traders do not care as they can make money out of other coins.

That is right. I think the block size has to be increased to get low fee.