Otherwise, the big problems that will surface in terms of tax havens and the issue of such an agreement are that there will be significant losses in collective wealth because tax evasion, tax leakage and audacious tax practices will continue.
So, at this point, there is reason to be against it, not to mention all the problems related to bi-directional money laundering in both jurisdictions. I think this obviously isn't the right time or place to go into details, but all these reasons are really good ones for opposing the agreement.