His first reponse: "The purpose of complying with kashrut is [a] to comply with Halâkhâh and [b] enable you to host Yehudim (even though they may still not trust your compliance with kashrut, decline to eat with you out of bigotry or may simply not be geographically proximate. It's part of qualifying your practice to meet community standards. Because of its centrality to all functions in the community, kashrut is one of the least flexible mitzwot."
He sent an additional comment later:"In my experience, there are some locations (notoriously, for example, south Florida and Tampa) where chauvinist Orthodox communities intransigently refuse to allow outsiders – even undisputed Orthodox Jews (much less Conservative or Reform) – to use their miqwëh. If that happens to you, realize that you're not the only one. While they should be helping and encouraging learners, don't allow their myopic arrogance to daunt, discourage or dissuade you because there are halakhically-acceptable alternatives: natural bodies of water such as seas, lakes, rivers and streams (but not bathtubs, swimming pools or the like).
"Some useful guidelines are found at:
"You'll need at least a couple of feet of water, since each utensil must be placed in the water individually and allowed to drop free and untouched by anything but the water for several seconds. Then remove the utensil from the water and set it aside. After all of the utensils have been immersed, recite the berâkhâh once for all of them." (Paqid Yirmeyahu, Ra'anana, Israel )
For more information, see the Netzarim website.