I get the controversy. I also completely understand the position held by Hackenslash and others. I've gone down that rabbit hole so far I had to dig out the dirt at the bottom. For any who are actually interested...
There are a few different arguments involved. First is the anti-China stuff but that really should be a separate conversation. Given that such a conversation is inevitably political, such a conversation should take place in the dedicated sub-forum for politics.
Second is the argument that Ganzo has a history of "stealing". Of course, stealing and copying (to whatever extent) are different things and not everyone is intellectually honest about the difference. (We also sometimes see conflation between copying and counterfeiting. The latter involves an additional step of intentional fraud and that's not what Ganzo is doing.) Many in the opposition lean on "IP theft" here but that's a legal construct. It's ultimately much more complicated and nuanced than hardly anyone making claims about it here actually understands. Whether or not something legally constitutes IP theft is not a matter of some dude-bro pointing a finger and saying it does.
Some object that "it really is stealing because it steals sales". That's voodoo economics. You can't steal a potential sale. Such a proposition is counterfactual by definition. There exist any number of possible reasons for consumers deciding to buy or not buy a product, including any number of other alternatives, including but not limited to "legitimate" options that are actually in the same range of price or quality. (Remember again that we are not talking about counterfeits or deception.) Some further object that "Sal Glesser says so" but that's an argument from authority by definition and has no logical bearing on the true statements presented here, no matter how smart, cool, or otherwise amazing the man is. Speaking of...
Third is "fruit of the poisoned tree" or "Ganzo can't do anything good because they also do bad and any support of them in any way is always bad". There are two important problems here. First is that a lot of outsourced manufacturing goes on in the dark and nobody knows what OEM work Ganzo does for any other company. So it's possible that some of the people arguing against Ganzo have purchased Ganzo-made products without knowing it and are therefore guilty of supporting Ganzo. Second is that Sal Glesser himself would be guilty under this type of argument, as would anyone buying any Spyderco knife. This is because Spyderco has not only used Sanrenmu for OEM work, they actually invested in Sanrenmu and helped to train them to get their skills up to the task. (If that's not "support", I don't know what is.) For anyone who doesn't know, Sanrenmu has been doing the same thing as Ganzo for many years with their Land series of aped CRK designs.
Now, none of this means that Ganzo's copying efforts are good. I'm not saying that copying the designs of others is a good thing. I'm not saying that Ganzo is a righteous or morally good company. I'm even willing to call Ganzo's copying "distasteful". The point is just that they are not the bastions of evil that the opposition here would have people believe and they don't cause the level of harm that the opposition claims. The logic behind the opposition's claims does not hold up.
What remains when all that melts away is emotion. Now, emotion is not logical and people can hate whomever or whatever they want. An important issue for me is when that becomes activism. It's on display here with people claiming that they will be boycotting BladeHQ, a supporting dealer here, because they carry one model from Ganzo with an original design. That's insane! It's also horribly misguided as far as activism goes. If anyone wants to talk about real activism or the underlying political and economic factors here, please join me in the political sub-forum.