yichusdik – “I guess my point is that your choice, which is personal and you are certainly entitled to it, is a political and social one, not a religious one. Don’t fool yourself into justifying your actions religiously, because halocho doesn’t require you to do this.”
This I believe is wrong. (Disclaimer – I’m only going with what the OP wrote – I didn’t check it out myself.)
The OP wrote -“I recently became aware that Target is selling Pride (for toaviah) merchandise.”
Now, he doesn’t specify whether these products are labeled as such. If they are, there definitely would be an Issur in buying them because all the money is going towards the Toeiva agenda.
Other products in the store would be Muttar to purchase.
If the product(s) aren’t labeled as such – then any product in the store becomes a Sofek. This could very well be a problem in Halacha. So his warning is Apropos!