Sure, just show me your data source that says global average temperature was hotter after the Renaissance than today.

The main drivers of the "little ice age" were decreased solar activity and increased volcanic activity (aerosols). These factors cannot explain the current warming we observe. 

The stratospheric cooling that is observed, confirms that CO2 is the primary driver of change in the last decades. The physics behind this are well established and 170 years old by now (Tyndall, Foote). The first accurate predictions of radiative forcing are 120 years old (Arrhenius). Feel free to disprove it but I'd suggest you educate yourself first